Year Number
1950 76.87
1951 77.788
1952 78.561
1953 79.018
1954 79.148
1955 79.027
1956 79.915
1957 80.355
1958 80.56
1959 80.712
1960 80.872
1961 81.521
1962 82.175
1963 82.743
1964 83.078
1965 83.135
1966 83.631
1967 83.795
1968 83.786
1969 83.859
1970 84.154
1971 84.969
1972 86.07
1973 87.264
1974 88.225
1975 88.771
1976 90.032
1977 90.452
1978 90.369
1979 90.231
1980 90.216
1981 89.897
1982 89.887
1983 89.863
1984 89.359
1985 88.205
1986 87.251
1987 85.668
1988 83.746
1989 81.909
1990 80.366
1991 79.148
1992 78.212
1993 77.464
1994 76.754
1995 76.028
1996 75.745
1997 75.415
1998 75.074
1999 74.765
2000 74.485
2001 74.561
2002 74.506
2003 74.359
2004 74.152
2005 73.888
2006 73.602
2007 73.313
2008 72.944
2009 72.396
2010 71.636
2011 70.992
2012 70.12
2013 69.106
2014 68.074
2015 67.09
2016 66.265
2017 65.483
2018 64.717
2019 63.924
2020 63.09
2021 62.455
2022 61.77
2023 61.061
2024 60.367
2025 59.706
2026 59.235
2027 58.771
2028 58.311
2029 57.845
2030 57.37
2031 57.041
2032 56.683
2033 56.314
2034 55.961
2035 55.635
2036 55.474
2037 55.31
2038 55.127
2039 54.9
2040 54.624
2041 54.447
2042 54.209
2043 53.924
2044 53.61
2045 53.278
2046 53.063
2047 52.819
2048 52.544
2049 52.235
2050 51.895
2051 51.673
2052 51.412
2053 51.127
2054 50.838
2055 50.558
2056 50.424
2057 50.28
2058 50.134
2059 49.996
2060 49.873
2061 49.907
2062 49.932
2063 49.946
2064 49.943
2065 49.924
2066 50.022
2067 50.088
2068 50.127
2069 50.141
2070 50.135
2071 50.246
2072 50.32
2073 50.36
2074 50.369
2075 50.352
2076 50.437
2077 50.485
2078 50.502
2079 50.495
2080 50.472
2081 50.565
2082 50.626
2083 50.663
2084 50.683
2085 50.694
2086 50.828
2087 50.937
2088 51.028
2089 51.103
2090 51.167
2091 51.353
2092 51.514
2093 51.656
2094 51.781
2095 51.893
2096 52.121
2097 52.323
2098 52.503
2099 52.665
2100 52.812