Year,Value,Contiguous U.S. (Lower 48),Temp,Dec-Feb,(°F)
1941,43.961
1942,41.303
1943,47.165
1944,46.224
1945,43.044
1946,43.87
1947,44.646
1948,39.371
1949,44.78
1950,50.112
1951,49.524
1952,49.081
1953,56.634
1954,57.734
1955,44.803
1956,46.449
1957,50.495
1958,52.743
1959,48.846
1960,45.642
1961,46.675
1962,42.934
1963,43.082
1964,40.468
1965,48.315
1966,44.409
1967,50.423
1968,44.015
1969,44.059
1970,49.059
1971,46.328
1972,48.343
1973,43.51
1974,47.769
1975,47.03
1976,53.458
1977,41.131
1978,41.999
1979,35.528
1980,50.628
1981,56.492
1982,44.839
1983,58.453
1984,43.326
1985,43.409
1986,50.834
1987,51.061
1988,45.488
1989,47.081
1990,49.297
1991,49.846
1992,60.314
1993,44.317
1994,47.924
1995,56.76
1996,50.281
1997,51.15
1998,56.214
1999,57.217
2000,59.279
2001,43.171
2002,57.563
2003,52.561
2004,47.697
2005,56.514
2006,56.796
2007,49.008
2008,48.003
2009,50.69
2010,42.302
2011,46.699
2012,59.833
2013,51.858
2014,46.058
2015,56.652
2016,60.552
2017,57.392
2018,55.582
2019,50.386
2020,60.962
2021,51.813
2022,55.549
2023,55.192
2024,66.303
2025,52.984