Year,Value,Contiguous U.S. (Lower 48),Temp,Sep,(°F)
1940,65.437
1941,64.61
1942,64.208
1943,65.376
1944,66.09
1945,65.794
1946,64.662
1947,66.866
1948,66.824
1949,64.297
1950,63.835
1951,64.65
1952,66.687
1953,67.091
1954,67.01
1955,66.617
1956,65.861
1957,64.739
1958,65.836
1959,65.106
1960,67.009
1961,63.509
1962,64.635
1963,66.605
1964,64.059
1965,61.99
1966,64.988
1967,64.5
1968,64.371
1969,65.879
1970,64.784
1971,64.625
1972,64.434
1973,64.663
1974,62.914
1975,63.618
1976,64.51
1977,66.116
1978,66.018
1979,67.284
1980,66.587
1981,65.485
1982,64.494
1983,66.03
1984,63.499
1985,62.864
1986,63.914
1987,65.787
1988,65.282
1989,64.659
1990,67.71
1991,65.224
1992,65.201
1993,63.92
1994,66.462
1995,65.43
1996,63.904
1997,66.699
1998,69.301
1999,64.816
2000,65.965
2001,66.117
2002,67.381
2003,65.505
2004,66.346
2005,68.205
2006,64.005
2007,67.344
2008,66.016
2009,67.114
2010,67.396
2011,67.055
2012,67.306
2013,67.245
2014,66.347
2015,69.15
2016,67.758
2017,67.107
2018,68.093
2019,69.493
2020,66.871
2021,68.8
2022,68.909
2023,68.824
2024,69.07
2025,68.408