Year,Value,Contiguous U.S. (Lower 48),SLP,Aug,(hPa)
1940,1015.422
1941,1015.301
1942,1015.514
1943,1013.375
1944,1014.327
1945,1015.674
1946,1016.212
1947,1015.078
1948,1014.169
1949,1014.638
1950,1015.485
1951,1014.315
1952,1014.167
1953,1015.391
1954,1014.87
1955,1014.413
1956,1014.464
1957,1015.681
1958,1013.579
1959,1013.099
1960,1013.577
1961,1016.643
1962,1014.547
1963,1014.965
1964,1013.89
1965,1014.684
1966,1015.247
1967,1016.685
1968,1016.079
1969,1013.076
1970,1013.699
1971,1015.08
1972,1015.221
1973,1014.319
1974,1014.769
1975,1015.0
1976,1015.91
1977,1014.206
1978,1014.665
1979,1014.252
1980,1013.292
1981,1014.61
1982,1015.931
1983,1016.09
1984,1014.907
1985,1014.986
1986,1015.385
1987,1015.134
1988,1013.807
1989,1014.09
1990,1015.756
1991,1016.101
1992,1016.669
1993,1015.108
1994,1015.057
1995,1012.59
1996,1015.947
1997,1015.414
1998,1016.062
1999,1014.339
2000,1014.824
2001,1015.197
2002,1015.284
2003,1015.615
2004,1015.123
2005,1014.353
2006,1014.368
2007,1013.436
2008,1012.71
2009,1014.754
2010,1012.725
2011,1012.077
2012,1013.861
2013,1015.337
2014,1014.584
2015,1014.036
2016,1014.815
2017,1015.006
2018,1014.692
2019,1013.765
2020,1013.422
2021,1014.217
2022,1014.832
2023,1014.167
2024,1015.803
2025,1016.304