Year Years
1950 36.2
1951 35.91
1952 35.47
1953 35.31
1954 35.431
1955 35.83
1956 36.501
1957 37.431
1958 38.593
1959 39.95
1960 41.449
1961 43.034
1962 44.639
1963 46.205
1964 47.686
1965 49.051
1966 50.291
1967 51.437
1968 52.512
1969 53.524
1970 54.482
1971 55.397
1972 56.281
1973 57.142
1974 57.984
1975 58.808
1976 59.613
1977 60.389
1978 61.129
1979 61.828
1980 62.482
1981 63.083
1982 63.633
1983 64.135
1984 64.594
1985 65.02
1986 65.425
1987 65.82
1988 66.208
1989 66.592
1990 66.966
1991 67.318
1992 67.638
1993 67.917
1994 68.153
1995 68.347
1996 68.502
1997 68.628
1998 68.734
1999 68.826
2000 68.914
2001 69.008
2002 69.107
2003 69.209
2004 69.309
2005 69.391
2006 69.434
2007 69.425
2008 69.365
2009 69.261
2010 69.136
2011 69.017
2012 68.933
2013 68.903
2014 68.935
2015 69.026
2016 69.165
2017 69.327
2018 69.492
2019 69.653
2020 69.802
2021 69.94
2022 70.073
2023 70.205
2024 70.337
2025 70.468
2026 70.601
2027 70.735
2028 70.869
2029 71.006
2030 71.143
2031 71.28
2032 71.418
2033 71.556
2034 71.694
2035 71.832
2036 71.971
2037 72.112
2038 72.254
2039 72.398
2040 72.543
2041 72.689
2042 72.833
2043 72.977
2044 73.121
2045 73.263
2046 73.406
2047 73.549
2048 73.694
2049 73.841
2050 73.99
2051 74.14
2052 74.293
2053 74.447
2054 74.602
2055 74.757
2056 74.913
2057 75.068
2058 75.223
2059 75.378
2060 75.534
2061 75.692
2062 75.854
2063 76.019
2064 76.187
2065 76.357
2066 76.528
2067 76.699
2068 76.868
2069 77.035
2070 77.201
2071 77.365
2072 77.53
2073 77.696
2074 77.864
2075 78.033
2076 78.203
2077 78.373
2078 78.543
2079 78.713
2080 78.883
2081 79.054
2082 79.226
2083 79.398
2084 79.571
2085 79.745
2086 79.919
2087 80.092
2088 80.265
2089 80.437
2090 80.607
2091 80.777
2092 80.946
2093 81.115
2094 81.283
2095 81.451
2096 81.619
2097 81.787
2098 81.954
2099 82.121