Year,Value,Contiguous U.S. (Lower 48),Snow,Oct-Apr,(in.)
1941,39.138
1942,40.041
1943,41.351
1944,38.589
1945,42.48
1946,41.618
1947,47.524
1948,51.183
1949,50.973
1950,51.559
1951,48.974
1952,58.03
1953,46.056
1954,44.54
1955,43.053
1956,52.424
1957,43.654
1958,50.163
1959,44.334
1960,52.134
1961,46.398
1962,51.084
1963,38.673
1964,46.943
1965,50.363
1966,41.303
1967,49.999
1968,43.461
1969,55.774
1970,49.474
1971,55.616
1972,49.987
1973,48.841
1974,51.17
1975,55.34
1976,46.722
1977,34.69
1978,52.261
1979,51.833
1980,46.643
1981,31.987
1982,54.895
1983,52.799
1984,53.001
1985,49.514
1986,47.592
1987,42.208
1988,40.813
1989,43.646
1990,38.598
1991,39.709
1992,34.197
1993,54.531
1994,41.684
1995,43.114
1996,46.818
1997,53.337
1998,45.654
1999,47.033
2000,34.922
2001,42.032
2002,37.38
2003,40.757
2004,40.548
2005,38.374
2006,40.839
2007,39.235
2008,47.245
2009,44.932
2010,46.788
2011,54.017
2012,33.774
2013,42.526
2014,43.959
2015,33.74
2016,38.987
2017,45.095
2018,41.527
2019,50.138
2020,40.672
2021,40.382
2022,38.774
2023,50.906
2024,35.377
2025,36.88