Year,Value,Ontario Province (Territory),Precip,Mar-May,(cm)
1940,14.543
1941,12.716
1942,18.323
1943,14.926
1944,13.373
1945,21.861
1946,14.447
1947,17.806
1948,17.176
1949,14.604
1950,18.347
1951,17.897
1952,16.58
1953,17.055
1954,22.347
1955,15.96
1956,16.269
1957,15.357
1958,14.086
1959,19.25
1960,17.628
1961,16.263
1962,16.423
1963,17.554
1964,17.344
1965,13.477
1966,15.876
1967,16.029
1968,15.783
1969,14.092
1970,16.38
1971,14.406
1972,11.468
1973,17.643
1974,19.502
1975,13.459
1976,16.749
1977,14.217
1978,14.614
1979,20.592
1980,14.555
1981,14.393
1982,17.417
1983,16.876
1984,13.514
1985,19.475
1986,16.697
1987,12.728
1988,15.669
1989,13.839
1990,16.106
1991,17.118
1992,16.565
1993,13.531
1994,16.288
1995,14.024
1996,14.622
1997,14.386
1998,14.583
1999,14.183
2000,17.814
2001,18.397
2002,19.86
2003,13.607
2004,20.126
2005,13.52
2006,16.225
2007,18.07
2008,18.466
2009,20.342
2010,12.2
2011,17.858
2012,18.168
2013,18.125
2014,17.942
2015,18.064
2016,14.77
2017,20.444
2018,13.611
2019,18.272
2020,15.238
2021,16.446
2022,22.006
2023,17.149
2024,20.859
2025,15.989