Year,Value,Contiguous U.S. (Lower 48),Precip,Jul,(in.)
1940,2.37
1941,2.81
1942,2.111
1943,2.051
1944,2.089
1945,3.037
1946,2.258
1947,1.928
1948,2.585
1949,2.816
1950,3.403
1951,2.519
1952,1.975
1953,2.357
1954,1.715
1955,2.445
1956,2.331
1957,1.995
1958,3.485
1959,2.606
1960,2.382
1961,2.599
1962,2.518
1963,2.285
1964,2.215
1965,2.193
1966,1.768
1967,2.426
1968,2.155
1969,2.525
1970,1.89
1971,2.438
1972,2.657
1973,2.77
1974,1.927
1975,2.529
1976,2.481
1977,2.436
1978,2.652
1979,3.072
1980,2.015
1981,3.028
1982,3.044
1983,2.118
1984,2.79
1985,2.938
1986,2.844
1987,2.733
1988,2.693
1989,2.822
1990,2.959
1991,2.626
1992,3.637
1993,3.261
1994,3.088
1995,2.633
1996,3.043
1997,2.649
1998,2.515
1999,2.255
2000,2.178
2001,2.476
2002,2.38
2003,2.349
2004,2.762
2005,2.395
2006,2.146
2007,2.514
2008,2.475
2009,2.763
2010,2.926
2011,2.075
2012,2.131
2013,2.853
2014,2.158
2015,2.69
2016,2.493
2017,2.437
2018,2.625
2019,2.485
2020,2.454
2021,3.155
2022,2.538
2023,2.396
2024,2.802
2025,2.813