Year,Value,Lake Superior,Temp,Jul,(°F)
1940,57.923
1941,62.838
1942,60.806
1943,60.054
1944,60.533
1945,59.921
1946,62.355
1947,57.241
1948,62.879
1949,63.446
1950,58.492
1951,62.187
1952,63.42
1953,62.529
1954,60.204
1955,67.739
1956,58.558
1957,62.449
1958,60.935
1959,63.687
1960,60.853
1961,62.603
1962,60.262
1963,62.415
1964,65.191
1965,59.93
1966,63.345
1967,59.933
1968,61.237
1969,60.553
1970,62.947
1971,59.426
1972,58.64
1973,62.666
1974,61.016
1975,62.907
1976,63.868
1977,62.871
1978,57.807
1979,62.068
1980,63.654
1981,62.631
1982,60.516
1983,64.689
1984,62.057
1985,62.216
1986,64.35
1987,64.778
1988,65.668
1989,62.117
1990,61.943
1991,63.166
1992,58.535
1993,61.463
1994,60.233
1995,62.962
1996,58.323
1997,60.82
1998,66.79
1999,64.938
2000,62.768
2001,63.588
2002,65.679
2003,62.146
2004,62.325
2005,65.669
2006,67.234
2007,65.407
2008,61.817
2009,59.029
2010,66.922
2011,64.099
2012,70.157
2013,60.546
2014,50.1
2015,53.398
2016,58.122
2017,51.876
2018,52.543
2019,52.935
2020,56.435
2021,59.078
2022,49.703
2023,51.772
2024,58.485