Year HC Anomaly +/- (1 s. e.) (Joules) 1950 -2.63E+23 4.91E+22 1951 -1.75E+23 4.26E+22 1952 -1.52E+23 4.89E+22 1953 -1.50E+23 5.90E+22 1954 -1.57E+23 5.16E+22 1955 -2.56E+23 5.37E+22 1956 -1.19E+23 6.10E+22 1957 -1.25E+23 4.68E+22 1958 -5.55E+22 3.72E+22 1959 -1.04E+23 4.29E+22 1960 -1.76E+23 3.53E+22 1961 -1.39E+23 3.66E+22 1962 -6.13E+22 3.29E+22 1963 -1.05E+23 3.13E+22 1964 -9.81E+22 2.76E+22 1965 -1.18E+23 2.74E+22 1966 -9.22E+22 2.84E+22 1967 -1.10E+23 2.73E+22 1968 -1.86E+23 2.49E+22 1969 -1.52E+23 1.94E+22 1970 -1.50E+23 1.98E+22 1971 -1.52E+23 1.92E+22 1972 -1.05E+23 1.87E+22 1973 -1.39E+23 1.91E+22 1974 -1.76E+23 1.99E+22 1975 -1.23E+23 1.95E+22 1976 -1.74E+23 1.89E+22 1977 -1.26E+23 1.81E+22 1978 -1.75E+23 1.84E+22 1979 -1.25E+23 1.77E+22 1980 -5.21E+22 1.85E+22 1981 -7.98E+22 1.78E+22 1982 -1.10E+23 1.75E+22 1983 -4.79E+22 1.70E+22 1984 -1.67E+23 1.57E+22 1985 -1.40E+23 1.52E+22 1986 -1.23E+23 1.55E+22 1987 -1.31E+23 1.55E+22 1988 -1.77E+22 1.57E+22 1989 3.98E+22 1.57E+22 1990 3.78E+21 1.43E+22 1991 1.40E+22 1.36E+22 1992 -1.54E+22 1.30E+22 1993 -2.23E+22 1.09E+22 1994 -3.63E+21 1.09E+22 1995 -1.00E+22 1.03E+22 1996 1.17E+22 1.15E+22 1997 -1.43E+22 1.11E+22 1998 -1.80E+22 1.05E+22 1999 2.44E+22 1.07E+22 2000 1.67E+21 1.07E+22 2001 -2.83E+21 1.03E+22 2002 3.63E+22 9.63E+21 2003 4.15E+22 9.40E+21 2004 7.09E+22 8.74E+21 2005 8.77E+22 9.50E+21 2006 9.26E+22 1.09E+22 2007 9.10E+22 1.26E+22 2008 1.19E+23 1.53E+22 2009 1.09E+23 1.46E+22