Year,Value,Canada (Country),Precip,May,(cm)
1940,4.792
1941,5.053
1942,4.799
1943,5.003
1944,5.026
1945,4.759
1946,4.426
1947,5.101
1948,4.625
1949,5.138
1950,4.931
1951,5.426
1952,5.026
1953,4.609
1954,5.255
1955,5.512
1956,4.537
1957,4.283
1958,5.321
1959,5.569
1960,5.769
1961,4.656
1962,5.177
1963,4.386
1964,5.62
1965,5.563
1966,4.807
1967,4.592
1968,4.135
1969,4.677
1970,5.157
1971,4.196
1972,4.058
1973,4.84
1974,5.701
1975,4.673
1976,5.748
1977,5.804
1978,5.179
1979,5.778
1980,4.747
1981,4.713
1982,4.849
1983,5.175
1984,5.851
1985,4.899
1986,5.304
1987,5.067
1988,5.319
1989,5.581
1990,4.951
1991,5.054
1992,5.093
1993,5.632
1994,5.336
1995,4.119
1996,4.797
1997,5.386
1998,4.712
1999,5.92
2000,5.8
2001,5.942
2002,4.951
2003,4.871
2004,5.836
2005,4.794
2006,5.664
2007,5.224
2008,4.894
2009,5.133
2010,5.44
2011,5.072
2012,5.501
2013,5.229
2014,5.486
2015,4.514
2016,5.478
2017,5.685
2018,4.525
2019,4.113
2020,4.952
2021,5.029
2022,6.158
2023,4.306
2024,6.101
2025,4.809