Year Years
1950 40.6
1951 40.846
1952 41.343
1953 41.847
1954 42.357
1955 42.875
1956 43.401
1957 43.935
1958 44.478
1959 45.032
1960 45.598
1961 46.176
1962 46.762
1963 47.35
1964 47.927
1965 48.476
1966 48.98
1967 49.426
1968 49.806
1969 50.116
1970 50.356
1971 50.531
1972 50.655
1973 50.744
1974 50.806
1975 50.852
1976 50.889
1977 50.92
1978 50.942
1979 50.952
1980 50.941
1981 50.897
1982 50.811
1983 50.674
1984 50.487
1985 50.245
1986 49.945
1987 49.6
1988 49.227
1989 48.845
1990 48.466
1991 48.098
1992 47.759
1993 47.474
1994 47.274
1995 47.202
1996 47.302
1997 47.588
1998 48.058
1999 48.703
2000 49.501
2001 50.417
2002 51.402
2003 52.409
2004 53.408
2005 54.381
2006 55.328
2007 56.259
2008 57.177
2009 58.065
2010 58.899
2011 59.654
2012 60.319
2013 60.89
2014 61.369
2015 61.766
2016 62.097
2017 62.389
2018 62.667
2019 62.946
2020 63.239
2021 63.55
2022 63.874
2023 64.206
2024 64.549
2025 64.903
2026 65.266
2027 65.634
2028 66.005
2029 66.374
2030 66.74
2031 67.099
2032 67.451
2033 67.794
2034 68.129
2035 68.455
2036 68.772
2037 69.083
2038 69.389
2039 69.691
2040 69.99
2041 70.288
2042 70.583
2043 70.876
2044 71.166
2045 71.453
2046 71.734
2047 72.008
2048 72.275
2049 72.533
2050 72.78
2051 73.017
2052 73.244
2053 73.461
2054 73.668
2055 73.867
2056 74.055
2057 74.236
2058 74.41
2059 74.578
2060 74.741
2061 74.901
2062 75.058
2063 75.214
2064 75.368
2065 75.521
2066 75.674
2067 75.826
2068 75.976
2069 76.126
2070 76.274
2071 76.422
2072 76.569
2073 76.715
2074 76.86
2075 77.005
2076 77.148
2077 77.289
2078 77.429
2079 77.568
2080 77.705
2081 77.84
2082 77.974
2083 78.108
2084 78.24
2085 78.373
2086 78.506
2087 78.639
2088 78.771
2089 78.904
2090 79.035
2091 79.163
2092 79.288
2093 79.41
2094 79.526
2095 79.638
2096 79.745
2097 79.846
2098 79.942
2099 80.033