Year,Value,North America,Temp,May,(°F)
1948,49.313
1949,48.714
1950,48.781
1951,50.18
1952,50.616
1953,49.25
1954,48.684
1955,50.009
1956,48.07
1957,48.176
1958,50.728
1959,48.35
1960,49.976
1961,48.289
1962,48.688
1963,48.921
1964,49.211
1965,49.056
1966,48.502
1967,47.609
1968,48.197
1969,49.188
1970,48.522
1971,48.902
1972,48.989
1973,50.052
1974,48.543
1975,50.152
1976,49.156
1977,51.062
1978,49.117
1979,48.999
1980,51.401
1981,50.245
1982,49.391
1983,46.929
1984,49.677
1985,50.836
1986,50.506
1987,50.359
1988,50.716
1989,49.769
1990,49.564
1991,51.595
1992,48.695
1993,50.955
1994,50.813
1995,50.239
1996,49.28
1997,48.813
1998,53.096
1999,50.139
2000,50.316
2001,51.417
2002,48.204
2003,51.087
2004,49.251
2005,50.897
2006,52.766
2007,50.768
2008,50.698
2009,49.331
2010,51.0
2011,50.318
2012,52.549
2013,50.257
2014,51.31
2015,51.568
2016,52.403
2017,51.778
2018,52.372
2019,50.946
2020,50.604
2021,50.553
2022,51.526
2023,53.989
2024,52.792
2025,51.883