Year,Value,Lake Superior,SST,Feb,(°C) 1940,-0.943 1941,-0.973 1942,-0.974 1943,-0.974 1944,-0.943 1945,-0.973 1946,-0.974 1947,-0.974 1948,-0.943 1949,-0.974 1950,-0.974 1951,-0.974 1952,-0.943 1953,-0.974 1954,-0.974 1955,-0.974 1956,-0.943 1957,-0.974 1958,-0.974 1959,-0.974 1960,1.586 1961,-0.442 1962,-1.278 1963,-1.454 1964,0.853 1965,-1.14 1966,-0.343 1967,-0.859 1968,-1.274 1969,0.273 1970,-0.319 1971,-0.06 1972,-0.808 1973,0.19 1974,-0.897 1975,1.315 1976,1.545 1977,-1.434 1978,-0.782 1979,-1.413 1980,0.001 1981,-0.879 1982,-0.53 1983,1.321 1984,0.591 1985,-0.967 1986,-0.523 1987,1.119 1988,1.176 1989,0.982 1990,1.207 1991,0.657 1992,1.274 1993,0.962 1994,-1.475 1995,1.384 1996,-0.445 1997,0.748 1998,1.414 1999,1.406 2000,1.409 2001,1.365 2002,1.414 2003,0.31 2004,1.175 2005,1.408 2006,1.414 2007,1.354 2008,0.0 2009,0.0 2010,0.0 2011,-0.0 2012,-0.0 2013,-0.0 2014,-1.589 2015,-1.437 2016,0.18 2017,0.775 2018,-0.89 2019,-1.214 2020,0.133 2021,-0.079 2022,-0.429 2023,0.461 2024,1.004 2025,0.057