Year,Value,Contiguous U.S. (Lower 48),Temp,Feb,(°F)
1940,29.937
1941,30.717
1942,28.165
1943,34.225
1944,33.544
1945,33.536
1946,32.245
1947,28.818
1948,30.819
1949,31.677
1950,35.408
1951,34.25
1952,35.537
1953,35.736
1954,40.982
1955,30.969
1956,32.163
1957,37.951
1958,31.924
1959,32.453
1960,30.592
1961,37.146
1962,34.7
1963,33.866
1964,31.818
1965,32.2
1966,31.008
1967,32.698
1968,32.916
1969,32.915
1970,35.26
1971,33.591
1972,33.582
1973,33.566
1974,34.822
1975,32.978
1976,39.601
1977,36.344
1978,28.114
1979,28.348
1980,33.119
1981,36.648
1982,32.631
1983,36.845
1984,37.462
1985,30.838
1986,35.851
1987,37.148
1988,33.51
1989,29.104
1990,36.628
1991,39.727
1992,39.502
1993,31.043
1994,31.924
1995,37.346
1996,35.394
1997,35.89
1998,38.235
1999,39.361
2000,39.605
2001,33.358
2002,35.916
2003,32.648
2004,33.398
2005,37.603
2006,34.779
2007,32.724
2008,34.785
2009,36.806
2010,31.866
2011,33.207
2012,37.815
2013,34.905
2014,32.339
2015,33.267
2016,39.389
2017,41.447
2018,36.041
2019,32.251
2020,36.578
2021,30.928
2022,33.857
2023,36.653
2024,40.815
2025,35.106