1852.50  -230.0000
1857.50  -230.0000
1862.50  -246.0000
1867.50  -246.0000
1872.50  -239.0000
1877.50  -240.0000
1882.50  -275.0000
1887.50  -177.0000
1892.50  -289.0000
1897.50  -186.0000
1902.50  -292.0000
1907.50  -234.0000
1912.50  -286.0000
1917.50  -287.0000
1922.50  -349.0000
1927.50  -357.0000
1932.50  -377.0000
1937.50  -362.0000
1942.50  -416.0000
1947.50  -417.0000
1952.50  -351.0000
1957.50  -333.0000
1962.50  -184.0000
1967.50  -161.0000
1972.50  -157.0000
1977.50  -289.0000
1982.50  -306.0000
1987.50  -369.0000
1992.50  -389.0000
1997.50  -559.0000
2002.50  -911.0000
2007.50  -744.0000

Glacier mass balance: 

Cogley (2009) simple average (green). 

Cogley J.G. (2009): Geodetic and direct mass-balance 
measurements: comparison and joint analysis. Annals 
of Glaciology 50(50) 96-100.

Values are five year averages.

Data obtained from Graham Cogley