Year,Value,WFO Anchorage,Clouds,Mar-May,(%)
1940,65.286
1941,76.634
1942,70.522
1943,72.48
1944,74.417
1945,66.726
1946,73.701
1947,71.153
1948,64.685
1949,72.523
1950,73.194
1951,70.292
1952,72.241
1953,67.179
1954,62.545
1955,72.078
1956,69.86
1957,67.916
1958,71.089
1959,68.883
1960,63.237
1961,67.386
1962,69.626
1963,69.416
1964,69.625
1965,77.97
1966,69.532
1967,61.392
1968,71.596
1969,73.705
1970,73.738
1971,72.523
1972,65.857
1973,76.788
1974,66.504
1975,73.546
1976,75.118
1977,75.494
1978,68.697
1979,72.71
1980,77.554
1981,65.304
1982,74.905
1983,72.808
1984,71.808
1985,73.882
1986,61.108
1987,70.425
1988,79.249
1989,69.067
1990,71.212
1991,72.803
1992,67.06
1993,71.741
1994,78.001
1995,68.783
1996,61.463
1997,57.184
1998,77.241
1999,69.869
2000,70.276
2001,73.26
2002,58.354
2003,62.393
2004,73.455
2005,68.744
2006,68.267
2007,69.088
2008,78.005
2009,68.722
2010,72.735
2011,60.337
2012,71.987
2013,61.911
2014,57.392
2015,72.426
2016,71.304
2017,56.634
2018,73.107
2019,72.634
2020,69.102
2021,69.343
2022,66.448
2023,73.432
2024,77.041
2025,78.331