Year,Value,Canada (Country),Temp,Mar-May,(°F)
1940,22.222
1941,20.591
1942,22.741
1943,19.307
1944,21.575
1945,19.301
1946,23.024
1947,20.067
1948,17.464
1949,20.703
1950,19.076
1951,20.532
1952,23.46
1953,22.504
1954,18.345
1955,19.472
1956,17.726
1957,20.851
1958,22.531
1959,18.939
1960,19.176
1961,18.763
1962,20.185
1963,19.374
1964,16.675
1965,20.372
1966,20.063
1967,16.623
1968,21.379
1969,20.018
1970,19.598
1971,21.072
1972,17.96
1973,21.96
1974,16.484
1975,19.948
1976,20.752
1977,23.529
1978,18.784
1979,19.7
1980,22.811
1981,23.128
1982,18.153
1983,18.77
1984,22.137
1985,20.598
1986,20.906
1987,21.94
1988,23.223
1989,18.812
1990,22.165
1991,22.383
1992,20.171
1993,22.499
1994,21.844
1995,21.568
1996,19.095
1997,18.877
1998,25.268
1999,24.275
2000,22.414
2001,23.168
2002,16.693
2003,20.401
2004,19.069
2005,23.867
2006,25.522
2007,20.814
2008,20.63
2009,18.984
2010,27.417
2011,19.814
2012,23.098
2013,20.915
2014,19.235
2015,22.173
2016,22.997
2017,21.221
2018,20.858
2019,23.083
2020,19.934
2021,22.252
2022,21.354
2023,23.824
2024,24.587
2025,22.854