Year Number
1950 69.63
1951 71.109
1952 72.91
1953 74.286
1954 74.972
1955 75.063
1956 76.463
1957 76.836
1958 76.681
1959 76.461
1960 76.344
1961 76.735
1962 77.318
1963 77.862
1964 78
1965 77.62
1966 77.913
1967 77.621
1968 77.005
1969 76.423
1970 76.042
1971 76.611
1972 77.207
1973 77.823
1974 78.388
1975 78.861
1976 80.141
1977 81.224
1978 82.171
1979 83.072
1980 83.985
1981 85.542
1982 87.047
1983 88.443
1984 89.61
1985 90.477
1986 92.059
1987 93.039
1988 93.584
1989 93.906
1990 94.099
1991 94.602
1992 94.946
1993 95.048
1994 94.751
1995 94.006
1996 93.719
1997 92.904
1998 91.732
1999 90.418
2000 89.08
2001 88.25
2002 87.324
2003 86.33
2004 85.27
2005 84.159
2006 83.615
2007 82.936
2008 82.171
2009 81.382
2010 80.61
2011 80.305
2012 79.909
2013 79.461
2014 78.974
2015 78.448
2016 78.351
2017 78.089
2018 77.683
2019 77.153
2020 76.51
2021 76.054
2022 75.459
2023 74.735
2024 73.881
2025 72.912
2026 72.164
2027 71.277
2028 70.292
2029 69.26
2030 68.215
2031 67.443
2032 66.618
2033 65.768
2034 64.911
2035 64.06
2036 63.481
2037 62.866
2038 62.234
2039 61.601
2040 60.975
2041 60.574
2042 60.141
2043 59.695
2044 59.247
2045 58.808
2046 58.574
2047 58.304
2048 58.003
2049 57.673
2050 57.317
2051 57.098
2052 56.827
2053 56.514
2054 56.173
2055 55.813
2056 55.585
2057 55.313
2058 55.008
2059 54.675
2060 54.326
2061 54.105
2062 53.844
2063 53.557
2064 53.256
2065 52.953
2066 52.789
2067 52.596
2068 52.387
2069 52.173
2070 51.963
2071 51.89
2072 51.796
2073 51.689
2074 51.579
2075 51.472
2076 51.501
2077 51.505
2078 51.489
2079 51.456
2080 51.408
2081 51.47
2082 51.495
2083 51.49
2084 51.461
2085 51.414
2086 51.464
2087 51.477
2088 51.461
2089 51.422
2090 51.368
2091 51.417
2092 51.428
2093 51.412
2094 51.382
2095 51.347
2096 51.422
2097 51.471
2098 51.502
2099 51.519
2100 51.529