Year,Value,Contiguous U.S. (Lower 48),Temp,Aug,(°C)
1940,22.601
1941,22.415
1942,22.321
1943,23.546
1944,23.026
1945,22.464
1946,22.214
1947,23.401
1948,22.645
1949,22.622
1950,21.502
1951,22.469
1952,23.0
1953,22.645
1954,22.589
1955,23.622
1956,22.41
1957,22.421
1958,23.339
1959,23.061
1960,22.619
1961,22.787
1962,22.723
1963,22.465
1964,21.771
1965,21.932
1966,21.893
1967,22.175
1968,21.583
1969,23.285
1970,23.361
1971,22.562
1972,22.289
1973,22.897
1974,21.569
1975,22.327
1976,21.757
1977,22.257
1978,22.406
1979,22.124
1980,22.996
1981,22.637
1982,22.588
1983,24.172
1984,23.073
1985,22.147
1986,22.286
1987,22.411
1988,23.427
1989,22.125
1990,22.706
1991,23.035
1992,21.342
1993,22.382
1994,22.907
1995,23.956
1996,22.742
1997,22.28
1998,23.525
1999,23.035
2000,23.71
2001,23.751
2002,23.01
2003,23.927
2004,21.595
2005,23.318
2006,23.39
2007,24.196
2008,22.925
2009,22.639
2010,23.925
2011,24.546
2012,23.879
2013,23.113
2014,22.584
2015,23.322
2016,23.53
2017,22.732
2018,23.606
2019,23.799
2020,24.401
2021,23.843
2022,24.1
2023,24.196
2024,23.584
2025,23.394