Year,Value,Alaska (State),Clouds,May,(%)
1940,66.204
1941,71.174
1942,68.024
1943,74.842
1944,76.327
1945,68.061
1946,78.885
1947,73.866
1948,67.528
1949,76.482
1950,72.037
1951,64.601
1952,71.884
1953,69.952
1954,63.861
1955,75.261
1956,74.477
1957,63.252
1958,72.91
1959,71.508
1960,64.542
1961,61.897
1962,74.606
1963,66.605
1964,67.139
1965,78.817
1966,73.856
1967,63.288
1968,64.885
1969,66.379
1970,64.975
1971,80.086
1972,68.169
1973,73.835
1974,54.453
1975,71.778
1976,76.323
1977,73.019
1978,62.763
1979,64.815
1980,71.62
1981,62.492
1982,74.796
1983,65.691
1984,65.775
1985,68.976
1986,66.6
1987,70.627
1988,77.902
1989,78.799
1990,71.736
1991,72.347
1992,67.633
1993,66.238
1994,73.654
1995,70.914
1996,63.673
1997,63.173
1998,79.551
1999,63.615
2000,65.572
2001,71.425
2002,56.736
2003,69.027
2004,78.131
2005,70.789
2006,67.166
2007,69.892
2008,70.929
2009,59.738
2010,68.276
2011,62.74
2012,74.111
2013,63.534
2014,68.376
2015,66.731
2016,68.384
2017,69.074
2018,76.902
2019,72.3
2020,57.146
2021,68.477
2022,66.356
2023,73.461
2024,75.915
2025,72.88