Year,Value,Contiguous U.S. (Lower 48),Temp,Mar,(°F)
1940,33.512
1941,18.747
1942,29.591
1943,18.91
1944,25.019
1945,66.917
1946,75.028
1947,17.091
1948,28.826
1949,78.142
1950,39.344
1951,53.23
1952,20.206
1953,96.88
1954,37.159
1955,62.886
1956,70.922
1957,77.845
1958,28.261
1959,73.284
1960,35.613
1961,95.416
1962,11.771
1963,93.72
1964,39.594
1965,15.117
1966,87.909
1967,86.713
1968,81.545
1969,11.15
1970,31.605
1971,53.299
1972,83.218
1973,85.095
1974,93.631
1975,33.08
1976,78.997
1977,79.008
1978,56.829
1979,89.4
1980,50.817
1981,69.066
1982,74.996
1983,72.739
1984,44.019
1985,80.703
1986,97.921
1987,66.746
1988,82.772
1989,78.432
1990,97.358
1991,73.432
1992,77.821
1993,44.954
1994,90.83
1995,79.402
1996,24.65
1997,83.065
1998,29.964
1999,52.02
2000,93.396
2001,34.917
2002,21.456
2003,57.306
2004,99.812
2005,42.95
2006,59.863
2007,96.011
2008,48.802
2009,64.839
2010,58.718
2011,54.227
2012,89.464
2013,39.471
2014,32.915
2015,71.842
2016,99.722
2017,89.028
2018,45.367
2019,18.097
2020,83.601
2021,70.503
2022,66.692
2023,36.425
2024,67.892
2025,93.378