Areal values from HadUK-Grid 1km gridded climate data from land surface network Source: Met Office National Climate Information Centre Monthly, seasonal and annual number of days in the month with air frost (minimum temperature below zero) for Northern Ireland Areal series, starting in 1931 Last updated 01-Sep-2025 14:21 jan year feb year mar year apr year may year jun year jul year aug year sep year oct year nov year dec year win year spr year sum year aut year ann year 27.0 1963 23.7 1947 21.3 1955 13.8 1936 5.8 1948 1.2 1936 0.0 1935 0.3 1956 2.3 1932 7.0 1939 15.1 1985 23.1 2010 59.6 1963 26.0 1955 1.4 1956 16.6 1952 93.1 2010 24.7 1979 22.7 1963 21.1 1937 13.0 1938 5.7 1979 1.1 1956 0.0 1948 0.3 1944 1.9 1952 6.4 1931 14.7 1969 20.5 1950 53.0 1951 25.2 1962 1.2 1936 15.2 1993 84.8 1979 24.5 1985 21.8 1968 18.5 1962 11.4 1983 5.1 1941 0.7 1957 0.0 1949 0.2 1939 1.5 1942 5.9 1993 12.7 2010 19.1 1961 51.7 2010 25.1 1932 0.7 1957 15.2 1985 80.1 1952 20.6 1952 21.0 1986 16.2 2013 9.4 1932 3.7 1951 0.4 1962 0.0 1955 0.1 1954 1.0 1954 5.3 1937 12.6 1996 17.2 1976 51.6 1979 24.0 1979 0.4 1962 15.1 2010 78.8 1969 20.3 1945 20.0 1956 14.7 1969 9.3 1968 3.6 1996 0.4 1975 0.0 1971 0.1 1935 0.8 1974 5.2 1955 11.9 1965 16.5 2009 48.0 1947 23.7 1951 0.4 1975 15.0 1969 78.4 1963 19.7 1959 19.7 1951 13.8 1951 9.0 2021 2.9 1935 0.3 1942 0.0 1942 0.0 1931 0.7 1940 3.8 1981 11.7 1952 16.2 1981 47.0 1952 23.3 2013 0.3 1939 12.7 1942 73.0 1985 19.1 1984 19.2 1960 13.8 1947 9.0 1986 2.9 1968 0.2 1953 0.0 1939 0.0 1964 0.6 1936 3.6 1941 10.1 1947 15.7 1960 46.5 2011 23.2 1969 0.3 1942 12.7 1936 72.5 1936 18.8 1941 18.9 1955 13.6 1979 8.8 1953 2.9 1982 0.2 1991 0.0 1952 0.0 1938 0.6 1986 3.3 1992 9.8 1936 15.6 1937 45.9 1941 22.7 1953 0.3 1944 12.6 1996 72.2 1955 18.1 1940 18.5 2010 13.5 1958 8.5 1970 2.9 1958 0.2 1949 0.0 1959 0.0 1937 0.6 1972 3.1 1952 9.5 1950 15.3 1952 45.7 1991 22.3 1937 0.2 1953 12.3 1965 71.1 1947 17.7 1956 18.2 1996 13.5 1953 8.5 1934 2.6 2021 0.1 1937 0.0 2002 0.0 2014 0.5 2020 3.0 1948 9.3 1993 14.9 1982 45.6 1936 22.2 1958 0.2 1991 11.3 1937 70.5 1951 17.6 1980 18.0 1969 13.5 1932 8.2 1956 2.6 1945 0.1 1952 0.0 2001 0.0 1957 0.4 1975 2.8 2003 9.2 1942 14.8 1935 44.6 1985 21.5 1970 0.2 1949 10.7 1950 69.3 1968 17.3 1939 17.8 1979 13.0 1970 8.0 1969 2.5 1973 0.1 1939 0.0 2000 0.0 1946 0.4 1935 2.7 1987 8.7 1977 14.1 2008 44.5 1977 21.0 1934 0.2 1954 10.5 1947 68.0 1986 17.2 2011 17.4 1970 12.7 1944 7.7 1989 2.5 1938 0.1 1934 0.0 1999 0.0 1934 0.4 1957 2.5 2018 8.4 1966 13.6 1968 44.3 1956 20.3 1968 0.1 1937 10.5 1973 67.4 1937 16.9 1977 17.2 1991 12.6 2010 6.8 2013 2.5 1943 0.0 1948 0.0 1998 0.0 1940 0.4 1949 2.5 1988 8.4 2016 13.4 2022 42.7 1986 19.8 1936 0.1 1935 10.0 1966 65.5 1941 16.8 2010 16.4 1952 12.6 2018 6.8 1954 2.4 1967 0.0 1972 0.0 1997 0.0 1982 0.3 1971 2.5 2002 8.1 1973 13.0 1995 41.7 1969 19.6 2010 0.1 1952 9.7 1988 64.2 1970 16.1 1936 16.3 1942 12.1 1931 6.5 1962 2.4 1984 0.0 1987 0.0 1996 0.0 1932 0.3 1931 2.4 1956 7.5 1972 12.8 1946 41.1 1970 18.5 1986 0.1 1934 9.5 1931 62.3 1956 16.0 1991 16.2 1941 11.6 1942 6.4 1966 2.4 1977 0.0 1955 0.0 1931 0.0 1955 0.3 2007 2.4 1973 7.2 1988 12.7 1939 41.1 1940 18.2 1947 0.1 1948 8.9 2019 61.4 1996 16.0 1965 15.9 1933 11.5 1995 6.3 1941 2.3 1942 0.0 1932 0.0 1995 0.0 1962 0.3 1948 2.3 2010 7.1 1971 12.7 1996 40.0 1968 18.1 1941 0.0 1931 8.9 1977 61.1 1942 15.8 1987 15.8 2018 11.5 1980 6.2 1951 2.3 1946 0.0 1941 0.0 2004 0.0 1966 0.3 1991 2.3 1935 7.0 1990 12.5 1969 39.6 1960 18.0 1984 0.0 1972 8.9 1971 61.1 1965 15.5 2021 14.7 1936 11.4 1987 6.1 1978 2.3 1932 0.0 1989 0.0 1994 0.0 1975 0.2 1943 2.3 1936 7.0 2019 12.4 1990 39.1 2009 17.8 1931 0.0 1955 8.6 2016 60.9 1984 15.0 1931 13.9 1932 11.4 2001 6.0 2000 2.2 1931 0.0 1999 0.0 1993 0.0 1977 0.2 2012 2.0 1942 6.7 1944 11.7 1933 39.0 1965 17.1 1973 0.0 1964 8.3 1972 59.4 1962 14.9 1986 13.8 1987 11.4 1934 6.0 2016 1.9 1955 0.0 2015 0.0 1992 0.0 1933 0.1 1969 1.9 1983 6.6 2005 11.5 1979 38.7 1987 17.1 1938 0.0 1987 8.2 1984 59.1 1931 14.8 1960 13.7 2001 11.2 1985 5.9 1998 1.8 2020 0.0 1998 0.0 1991 0.0 2020 0.1 1977 1.9 1984 6.5 2024 11.5 1964 38.3 1953 17.1 1975 0.0 1932 8.2 2012 59.0 1950 14.6 1948 13.5 1983 10.7 1984 5.8 1958 1.8 1959 0.0 2012 0.0 1990 0.0 2002 0.1 1941 1.9 2019 6.5 1979 11.4 1963 37.9 2001 16.9 1995 0.0 1941 8.2 1932 58.6 1940 14.0 2009 13.2 1978 10.5 1975 5.5 2010 1.8 1995 0.0 1950 0.0 1989 0.0 2001 0.1 1984 1.7 1932 6.4 2012 11.3 1938 37.9 1962 16.4 2018 0.0 1989 7.9 1954 57.7 1932 13.9 2001 13.2 1931 10.3 2006 5.3 1946 1.7 1939 0.0 1954 0.0 1988 0.0 2000 0.1 1979 1.6 1966 6.3 1984 11.3 2001 37.8 1982 15.9 1944 0.0 1999 7.8 1948 57.5 1960 13.7 1933 13.0 1944 9.5 1972 5.3 1973 1.7 1965 0.0 1940 0.0 1987 0.0 1999 0.1 1963 1.6 2012 6.3 1976 11.0 1992 37.5 1980 15.9 1983 0.0 1938 7.7 1934 57.4 1933 13.6 1978 13.0 1985 9.5 1986 5.3 1977 1.6 1993 0.0 2011 0.0 1986 0.0 1996 0.1 2010 1.5 1934 6.1 1934 10.9 1940 36.0 1996 15.2 1946 0.0 2015 7.6 1944 55.7 1939 13.2 1955 12.5 2004 9.4 2011 5.3 1975 1.5 1956 0.0 1969 0.0 1985 0.0 1998 0.1 2018 1.5 1954 6.1 1974 10.7 1989 35.7 2018 14.9 1942 0.0 1998 7.5 1933 55.2 1980 13.0 1982 12.2 1953 9.3 1973 5.0 1999 1.5 2010 0.0 2001 0.0 2003 0.0 1997 0.0 1982 1.4 1949 6.0 1933 10.4 2017 35.1 1955 14.5 1989 0.0 2012 7.4 1955 54.9 1987 12.9 1966 12.1 1954 9.2 2015 4.9 2012 1.4 1949 0.0 1984 0.0 2007 0.0 2004 0.0 2024 1.4 2008 6.0 1937 10.3 2000 34.8 1959 14.5 2021 0.0 1950 7.4 1983 53.8 2001 12.8 1951 12.1 1950 9.2 1940 4.9 1984 1.4 1981 0.0 2019 0.0 2005 0.0 1995 0.0 1939 1.4 1933 6.0 1970 10.0 1951 34.8 1933 14.4 1954 0.0 2014 7.3 1941 53.7 1982 12.8 1995 11.7 2016 8.7 1974 4.9 1939 1.4 2012 0.0 1977 0.0 2016 0.0 1994 0.0 1987 1.4 1971 5.9 1959 9.8 1962 33.9 1983 14.3 2001 0.0 1940 7.1 1935 53.3 1978 12.7 2025 11.6 1965 8.7 1965 4.8 1950 1.3 2019 0.0 1985 0.0 2024 0.0 1993 0.0 2013 1.4 1940 5.8 1980 9.6 1972 33.2 1939 13.9 2006 0.0 2011 7.1 1939 52.7 1973 12.6 1997 11.0 2009 8.7 1963 4.7 1979 1.3 1975 0.0 1997 0.0 2023 0.0 1992 0.0 1965 1.2 1964 5.7 1963 9.4 2012 32.5 1942 13.8 2015 0.0 1969 7.0 1990 52.1 1946 12.6 2015 10.8 1994 8.2 1971 4.6 2022 1.2 1957 0.0 2020 0.0 2022 0.0 1991 0.0 1988 1.2 2004 5.7 1967 9.3 1965 32.5 1945 13.8 1939 0.0 2001 7.0 1974 52.0 1953 11.9 1954 10.8 1981 8.1 1976 4.5 1933 1.1 1944 0.0 1982 0.0 2021 0.0 2003 0.0 1938 1.2 1951 5.4 1964 9.3 1967 31.4 1984 13.6 1980 0.0 1984 6.9 1940 51.6 1958 11.8 1962 10.7 2003 8.0 1968 4.4 1945 1.1 1934 0.0 1961 0.0 2020 0.0 2011 0.0 1983 1.2 1950 5.4 1954 9.1 1980 30.8 1948 13.6 1987 0.0 1977 6.8 1979 51.5 2013 11.6 1947 10.5 1973 7.7 1964 4.4 1996 1.1 1997 0.0 1974 0.0 2019 0.0 2005 0.0 1990 1.1 1943 5.4 1983 9.1 1986 30.6 1997 13.5 1956 0.0 2019 6.8 1976 50.7 2009 11.6 1972 10.5 2006 7.7 2023 4.3 1947 1.1 1950 0.0 2021 0.0 2018 0.0 2016 0.0 1951 1.0 1944 5.1 1982 9.1 1978 30.5 1938 13.4 1985 0.0 1982 6.8 2024 50.6 1976 11.5 1961 10.5 2013 7.6 2020 4.0 2008 1.0 1954 0.0 1986 0.0 2017 0.0 2024 0.0 2003 0.9 1946 5.1 1991 9.1 1993 30.3 1961 13.1 1996 0.0 1985 6.7 1964 50.1 1981 11.3 1942 10.4 1977 7.5 1952 4.0 2002 1.0 2015 0.0 2009 0.0 2015 0.0 2023 0.0 2017 0.9 1975 5.1 1961 8.9 2003 30.0 2015 13.0 1978 0.0 1946 6.6 2005 49.9 1995 11.2 1970 10.4 1937 7.5 1946 3.9 1971 0.8 1952 0.0 1933 0.0 2006 0.0 2022 0.0 1993 0.7 1953 4.9 1957 8.8 1999 29.6 1978 12.8 1974 0.0 1997 6.4 1980 49.5 1954 10.9 2024 10.3 1940 7.4 1949 3.8 1974 0.7 1936 0.0 2008 0.0 2014 0.0 2021 0.0 2005 0.6 1997 4.8 1946 8.6 1944 29.5 1994 12.5 1940 0.0 1971 6.4 1992 49.1 1935 10.9 2003 9.9 1958 7.3 2022 3.8 1981 0.6 1991 0.0 1967 0.0 2013 0.0 2019 0.0 1992 0.6 1980 4.8 1962 8.1 1970 29.2 2021 12.5 1971 0.0 2020 6.4 1981 48.9 1977 10.9 1958 9.8 1964 7.2 1939 3.8 2018 0.5 2005 0.0 1973 0.0 2012 0.0 2018 0.0 2001 0.5 1976 4.7 1940 8.1 1973 29.1 2013 11.9 1965 0.0 1961 6.1 1956 48.8 2018 10.9 1946 9.6 2015 7.1 2003 3.7 1967 0.5 1988 0.0 1995 0.0 2011 0.0 2017 0.0 1976 0.5 1945 4.7 1968 8.1 1936 28.7 2004 11.9 2022 0.0 1974 6.0 1959 48.4 1972 10.8 1953 9.6 1988 6.9 2014 3.6 1957 0.5 1969 0.0 1935 0.0 2010 0.0 2015 0.0 1933 0.5 2023 4.6 1943 7.7 2014 28.2 1966 11.8 1982 0.0 2021 6.0 1970 48.4 1944 10.7 1957 9.0 1948 6.7 1941 3.6 1995 0.4 1953 0.0 1964 0.0 2009 0.0 2006 0.0 2009 0.4 2000 4.6 1948 7.5 1998 27.7 1981 11.8 1976 0.0 1986 6.0 1949 48.0 1948 10.0 1969 8.7 2008 6.7 1989 3.6 1931 0.4 1978 0.0 1978 0.0 2008 0.0 2013 0.0 2008 0.4 1994 4.5 1978 7.5 1958 27.7 1954 11.7 1972 0.0 2009 6.0 1943 47.6 1991 9.9 1988 8.7 1957 6.6 1954 3.6 2015 0.4 1937 0.0 2017 0.0 1983 0.0 2012 0.0 1937 0.4 1962 4.5 1935 7.5 2020 27.1 2003 11.6 2016 0.0 1933 5.9 1967 46.6 1959 9.9 1998 8.5 1984 6.5 1993 3.5 1994 0.4 2006 0.0 2024 0.0 1984 0.0 1989 0.0 1944 0.4 1947 4.4 2013 7.3 2005 26.7 1958 11.5 1963 0.0 2008 5.8 1963 46.1 1983 9.7 1994 8.5 1982 6.5 1978 3.5 1976 0.4 1971 0.0 2023 0.0 1978 0.0 2010 0.0 2015 0.4 1965 4.3 1932 7.1 1947 26.5 1973 11.4 2020 0.0 1966 5.7 1946 46.0 1938 9.5 2018 8.4 2007 6.1 1982 3.4 1961 0.4 2007 0.0 2000 0.0 1982 0.0 2009 0.0 2016 0.3 2015 4.3 1989 7.1 1984 26.1 1937 11.0 1952 0.0 1967 5.5 1987 45.2 2003 9.2 2013 8.4 1980 5.9 2005 3.3 1940 0.3 1994 0.0 2022 0.0 1945 0.0 2008 0.0 1934 0.3 2007 4.2 1949 6.9 1985 25.7 1988 11.0 1948 0.0 1973 5.4 1982 44.7 1966 8.9 1968 8.3 1938 5.8 2002 3.2 2006 0.3 2016 0.0 2018 0.0 1957 0.0 2007 0.0 1995 0.3 2014 4.0 2023 6.7 1955 25.6 2023 10.7 1949 0.0 1995 5.4 1991 43.1 1971 8.9 1971 8.3 1935 5.6 2004 3.2 1959 0.3 2013 0.0 2002 0.0 1956 0.0 1990 0.0 1964 0.3 1998 3.8 1986 6.5 1994 25.3 1964 10.4 1935 0.0 1959 5.3 1957 43.0 1961 8.8 2017 7.7 1989 5.3 2016 3.1 1988 0.3 1985 0.0 2006 0.0 1954 0.0 1978 0.0 1989 0.3 1982 3.7 1956 6.4 2011 25.2 2006 10.4 1967 0.0 1978 5.2 1962 43.0 2008 8.4 1935 7.6 1971 5.3 1936 3.1 1948 0.3 1962 0.0 2005 0.0 1953 0.0 1988 0.0 2006 0.3 1958 3.7 1975 6.4 1949 24.7 1950 10.2 1966 0.0 1988 5.1 1975 42.9 2016 8.3 2016 7.6 1959 5.2 2017 2.9 1935 0.3 1974 0.0 2016 0.0 1951 0.0 1963 0.0 1996 0.3 1979 3.6 1941 6.2 1987 24.7 1934 10.2 2023 0.0 1968 5.1 1961 42.5 1993 8.1 2019 7.6 1976 5.2 2007 2.9 1955 0.2 2002 0.0 2014 0.0 1950 0.0 1960 0.0 1970 0.2 2016 3.6 2017 5.9 1957 24.6 1971 10.1 1964 0.0 2010 5.0 2008 42.3 1964 8.1 1999 7.6 1946 5.2 1996 2.8 1982 0.2 1980 0.0 2013 0.0 1947 0.0 1959 0.0 2002 0.2 1938 3.6 2008 5.9 2004 24.1 1972 10.0 2002 0.0 1963 4.9 2003 41.9 1934 7.9 2023 7.5 2005 5.1 2009 2.7 2001 0.2 1987 0.0 2010 0.0 1946 0.0 1958 0.0 2014 0.2 2009 3.5 2009 5.8 2019 23.4 1995 10.0 1999 0.0 1960 4.7 2018 40.8 2015 7.9 1967 7.2 1972 5.1 2008 2.7 1952 0.2 1963 0.0 2004 0.0 1944 0.0 1953 0.0 2019 0.2 2013 3.3 2000 5.7 1942 23.1 2016 9.8 1977 0.0 2013 4.7 1968 40.6 1975 7.8 1981 7.1 1934 5.1 1997 2.7 1990 0.2 1983 0.0 2007 0.0 1981 0.0 1952 0.0 2021 0.2 1969 3.3 1960 5.6 1959 23.1 1946 9.7 2003 0.0 1958 4.7 2013 40.6 2011 7.6 1937 7.1 1974 5.0 1999 2.6 1963 0.2 1989 0.0 2003 0.0 1943 0.0 1951 0.0 2022 0.2 2024 3.2 1997 5.5 1966 23.0 1957 9.5 2011 0.0 1951 4.5 1986 40.6 1945 7.4 2006 7.1 2017 4.5 1935 2.5 2003 0.2 2025 0.0 1931 0.0 1941 0.0 1950 0.0 2004 0.2 1967 3.1 1998 5.5 2002 22.7 1932 9.5 1950 0.0 2016 4.5 1978 40.2 1989 7.4 1992 7.1 1962 4.3 1983 2.5 2023 0.1 2001 0.0 1996 0.0 1940 0.0 1949 0.0 2023 0.1 2020 3.1 1992 5.5 1948 21.8 1999 9.4 2000 0.0 2017 4.4 2023 39.5 1967 7.3 1976 6.7 1992 4.3 1967 2.4 1964 0.1 1992 0.0 1994 0.0 1938 0.0 1948 0.0 2011 0.1 1960 3.1 1951 5.3 1971 21.4 1974 9.3 2012 0.0 2018 4.3 1951 38.4 1957 7.2 2004 6.5 2014 3.9 1933 2.1 1944 0.1 2018 0.0 1938 0.0 1937 0.0 1947 0.0 1962 0.1 1972 3.1 1995 5.2 1932 20.5 1944 9.2 2008 0.0 1947 4.3 1989 38.3 2021 6.9 1975 6.2 2021 3.8 1966 2.1 1972 0.1 1947 0.0 1943 0.0 1936 0.0 1945 0.0 2000 0.1 1985 2.8 1945 5.2 1975 20.4 1990 9.0 1993 0.0 1945 3.9 1997 38.2 2006 6.9 1949 6.2 1999 3.8 1943 2.0 1985 0.1 1933 0.0 1944 0.0 1934 0.0 1943 0.0 1999 0.1 1959 2.8 1931 5.1 2007 20.2 1993 8.9 1981 0.0 1943 3.8 2000 36.4 1988 6.6 1938 6.1 2011 3.8 2025 1.9 2020 0.1 1976 0.0 1945 0.0 1933 0.0 1942 0.0 1966 0.1 1986 2.7 1987 5.0 1941 20.0 1976 8.8 1945 0.0 2022 3.7 2009 35.9 2017 6.4 1973 6.0 1967 3.8 1981 1.9 1987 0.1 1961 0.0 1946 0.0 1958 0.0 1941 0.0 1967 0.1 1974 2.6 1981 4.9 2023 19.8 2008 8.6 1933 0.0 2023 3.7 2017 35.7 2022 6.3 1950 6.0 1966 3.8 1956 1.9 1980 0.1 2009 0.0 1947 0.0 1960 0.0 1936 0.0 1968 0.0 2017 2.4 1938 4.7 1945 19.8 2025 8.2 1998 0.0 2024 3.4 1998 35.6 2012 6.1 1974 6.0 1975 3.7 1991 1.9 1949 0.1 2000 0.0 1951 0.0 1961 0.0 1961 0.0 1960 0.0 1999 2.3 2006 4.7 1943 19.6 2024 8.1 2005 0.0 1965 3.4 1960 34.9 1999 6.0 2008 5.7 1990 3.6 1950 1.8 1997 0.1 2008 0.0 1958 0.0 1962 0.0 1965 0.0 1959 0.0 1970 2.3 1955 4.2 2006 19.4 1967 8.0 2014 0.0 2007 3.3 1945 34.8 2004 5.9 1943 5.3 1997 3.4 1988 1.7 2005 0.1 2017 0.0 1959 0.0 1980 0.0 1987 0.0 1958 0.0 2005 2.1 2018 4.0 2024 19.2 2000 8.0 1997 0.0 1990 3.1 1995 34.7 1949 5.8 1934 5.0 2019 3.2 2000 1.5 2024 0.1 1972 0.0 1960 0.0 1979 0.0 1967 0.0 1973 0.0 1963 2.1 2003 3.9 1983 18.5 2002 7.7 1959 0.0 2006 3.1 2004 34.4 1974 5.7 2000 4.9 2012 3.1 2024 1.5 1965 0.1 1960 0.0 1963 0.0 1932 0.0 1986 0.0 1956 0.0 1995 2.0 2007 3.8 2013 18.5 2017 7.1 1957 0.0 1983 2.8 2002 34.1 2005 5.5 1983 4.8 2022 3.0 1960 1.4 1960 0.1 2003 0.0 1965 0.0 1977 0.0 1985 0.0 1955 0.0 1996 1.8 2004 3.7 1953 17.9 2005 7.0 1988 0.0 1992 2.6 1938 34.0 1994 5.4 1993 4.8 2020 3.0 2012 1.3 2019 0.0 1986 0.0 1966 0.0 1976 0.0 1984 0.0 1953 0.0 2011 1.8 1999 3.6 1956 17.6 1992 6.8 1943 0.0 1993 2.6 2007 33.9 1990 5.3 2020 4.6 2000 2.9 2021 1.1 2007 0.0 2004 0.0 1968 0.0 1975 0.0 1983 0.0 1950 0.0 1991 1.7 1953 3.6 1997 17.6 2007 6.7 2007 0.0 1994 2.4 1953 33.9 2000 5.2 1932 4.6 1949 2.7 2019 1.1 2014 0.0 1940 0.0 1970 0.0 1974 0.0 1981 0.0 1980 0.0 2022 1.4 2011 3.6 1931 17.0 1949 6.2 1994 0.0 1981 2.3 2006 33.4 1992 5.1 2014 4.5 1939 2.6 1959 1.0 1991 0.0 1990 0.0 1971 0.0 1973 0.0 1980 0.0 1981 0.0 2021 1.3 2015 3.5 1991 16.9 1935 6.1 2004 0.0 1996 1.8 1999 33.3 1997 5.0 2007 4.4 2002 2.4 1994 1.0 1942 0.0 1966 0.0 1976 0.0 1972 0.0 1979 0.0 1947 0.0 1957 1.3 2014 3.1 2015 16.5 1998 5.9 2017 0.0 1980 1.7 2015 33.1 2019 4.7 1996 4.2 2023 2.3 1998 0.9 1937 0.0 2023 0.0 1979 0.0 1970 0.0 1976 0.0 1946 0.0 1961 1.1 2021 3.1 1954 15.8 2020 5.5 2009 0.0 1979 1.6 2014 32.1 1998 4.5 2022 4.1 1995 2.3 1957 0.8 1993 0.0 1998 0.0 1980 0.0 1969 0.0 1974 0.0 1985 0.0 2006 1.0 2022 2.9 1977 15.6 2019 5.3 2019 0.0 1976 1.4 2011 31.7 2023 4.5 2005 3.8 1993 2.1 1977 0.8 1992 0.0 2011 0.0 1981 0.0 1968 0.0 1973 0.0 1945 0.0 2001 0.8 1958 2.6 2016 15.4 2014 5.3 1991 0.0 2000 1.4 2020 30.3 2020 4.1 1964 3.7 2024 2.1 1948 0.7 2025 0.0 1999 0.0 1983 0.0 1967 0.0 1972 0.0 1961 0.0 1968 0.8 2020 2.4 2018 15.1 2012 4.7 1990 0.0 1970 1.1 1958 30.1 2024 4.0 1990 3.5 1945 2.0 1990 0.6 2017 0.0 2022 0.0 1988 0.0 1966 0.0 1971 0.0 1994 0.0 1990 0.6 2001 1.4 1974 14.3 1975 4.7 2024 0.0 2002 1.1 2021 28.9 2014 3.8 2012 3.1 1961 1.8 1945 0.6 2004 0.0 1964 0.0 1990 0.0 1965 0.0 1970 0.0 1997 0.0 1989 0.3 1994 1.0 2021 14.0 1943 4.6 2025 0.0 2003 1.1 2022 27.8 2007 2.9 1989 3.1 2025 1.6 1938 0.5 1943 0.0 2014 0.0 1992 0.0 1964 0.0 1969 0.0 1998 0.0 1977 0.3 2002 0.2 1934 10.7 1989 4.4 1960 0.0 2004 0.7 1994 25.7 1943 2.9 2002 3.0 1998 1.0 1992 0.3 2009 0.0 1970 0.0 1993 0.0 1963 0.0 1968 0.0 1978 0.0 1978 0.0 1939 0.1 1988 10.3 2022 4.3 1961 0.0 2005 0.7 2001 25.5 2002 2.8 1944 2.4 1943 0.7 1961 0.0 2011 0.0 2024 0.0 2025 0.0 2025 0.0 2025 --- 2025 --- 2025 --- 2025 --- 2025 --- 1931 1.9 1992 0.0 2025 --- 2025 --- 2025