Year Number
1950 64.54
1951 63.891
1952 62.217
1953 61.047
1954 61.136
1955 62.57
1956 64.938
1957 68.568
1958 72.985
1959 77.549
1960 81.869
1961 86.659
1962 90.852
1963 94.429
1964 97.421
1965 99.734
1966 101.426
1967 102.199
1968 102.044
1969 101.009
1970 99.204
1971 96.529
1972 93.654
1973 90.608
1974 87.355
1975 83.88
1976 80.203
1977 76.442
1978 72.744
1979 69.319
1980 66.298
1981 64.387
1982 62.786
1983 61.531
1984 60.646
1985 60.138
1986 60.425
1987 60.827
1988 61.284
1989 61.758
1990 62.22
1991 62.567
1992 62.927
1993 63.199
1994 63.241
1995 62.942
1996 62.548
1997 61.813
1998 60.745
1999 59.416
2000 57.903
2001 56.006
2002 54.096
2003 52.138
2004 50.096
2005 47.999
2006 46.114
2007 44.235
2008 42.518
2009 41.148
2010 40.17
2011 39.201
2012 38.658
2013 38.349
2014 38.119
2015 38.016
2016 39.532
2017 40.745
2018 41.874
2019 43.156
2020 44.612
2021 45.437
2022 46.599
2023 47.86
2024 48.883
2025 49.533
2026 50.132
2027 50.401
2028 50.364
2029 50.149
2030 49.848
2031 49.528
2032 49.101
2033 48.674
2034 48.337
2035 48.141
2036 48.18
2037 48.337
2038 48.58
2039 48.843
2040 49.086
2041 49.369
2042 49.593
2043 49.838
2044 50.201
2045 50.728
2046 51.456
2047 52.302
2048 53.234
2049 54.167
2050 55.06
2051 56.043
2052 56.967
2053 57.836
2054 58.655
2055 59.411
2056 60.205
2057 60.924
2058 61.524
2059 61.943
2060 62.155
2061 62.271
2062 62.183
2063 61.932
2064 61.566
2065 61.109
2066 60.648
2067 60.125
2068 59.548
2069 58.926
2070 58.282
2071 57.735
2072 57.137
2073 56.622
2074 56.372
2075 56.479
2076 57.047
2077 57.958
2078 59.079
2079 60.197
2080 61.172
2081 62.186
2082 63.082
2083 63.853
2084 64.497
2085 65.004
2086 65.473
2087 65.808
2088 66.021
2089 66.138
2090 66.185
2091 66.202
2092 66.16
2093 66.092
2094 66.044
2095 66.046
2096 66.066
2097 66.136
2098 66.26
2099 66.441
2100 66.683