Year Number
1950 78.4
1951 79.747
1952 80.962
1953 82.289
1954 83.573
1955 84.607
1956 85.534
1957 86.153
1958 86.425
1959 86.446
1960 86.327
1961 86.707
1962 87.229
1963 87.793
1964 88.105
1965 87.921
1966 88.008
1967 87.255
1968 86.032
1969 84.871
1970 84.001
1971 81.222
1972 79.321
1973 77.811
1974 76.061
1975 73.869
1976 72.244
1977 70.058
1978 67.772
1979 66.041
1980 65.12
1981 64.664
1982 64.915
1983 65.579
1984 66.12
1985 66.23
1986 66.861
1987 66.782
1988 66.21
1989 65.521
1990 64.876
1991 63.532
1992 62.488
1993 61.479
1994 60.132
1995 58.309
1996 56.3
1997 54.001
1998 51.565
1999 49.276
2000 47.296
2001 45.503
2002 43.991
2003 42.758
2004 41.769
2005 41.004
2006 40.627
2007 40.424
2008 40.404
2009 40.562
2010 40.874
2011 41.256
2012 41.714
2013 42.225
2014 42.748
2015 43.249
2016 43.769
2017 44.252
2018 44.674
2019 45.034
2020 45.339
2021 45.561
2022 45.722
2023 45.837
2024 45.946
2025 46.082
2026 46.365
2027 46.673
2028 46.958
2029 47.152
2030 47.224
2031 47.309
2032 47.281
2033 47.202
2034 47.154
2035 47.183
2036 47.42
2037 47.72
2038 48.074
2039 48.458
2040 48.864
2041 49.439
2042 50.005
2043 50.615
2044 51.354
2045 52.268
2046 53.491
2047 54.858
2048 56.28
2049 57.631
2050 58.825
2051 60.025
2052 61.056
2053 61.904
2054 62.549
2055 62.975
2056 63.332
2057 63.477
2058 63.43
2059 63.225
2060 62.906
2061 62.639
2062 62.265
2063 61.841
2064 61.437
2065 61.091
2066 60.981
2067 60.925
2068 60.923
2069 60.981
2070 61.105
2071 61.505
2072 61.953
2073 62.451
2074 62.973
2075 63.487
2076 64.197
2077 64.908
2078 65.581
2079 66.17
2080 66.647
2081 67.208
2082 67.668
2083 68.024
2084 68.277
2085 68.43
2086 68.606
2087 68.687
2088 68.683
2089 68.619
2090 68.511
2091 68.451
2092 68.347
2093 68.221
2094 68.095
2095 67.979
2096 67.949
2097 67.936
2098 67.95
2099 67.994
2100 68.062