Year Number
1950 67.404
1951 67.586
1952 67.916
1953 68.215
1954 68.439
1955 68.612
1956 69.105
1957 69.253
1958 69.257
1959 69.319
1960 69.511
1961 69.703
1962 69.998
1963 70.364
1964 70.654
1965 70.765
1966 70.847
1967 70.73
1968 70.475
1969 70.249
1970 70.144
1971 70.818
1972 71.406
1973 71.674
1974 71.32
1975 70.251
1976 71.17
1977 70.982
1978 70.138
1979 69.209
1980 68.451
1981 67.883
1982 67.687
1983 67.538
1984 66.994
1985 65.902
1986 64.777
1987 63.185
1988 61.378
1989 59.718
1990 58.391
1991 57.223
1992 56.379
1993 55.729
1994 55.086
1995 54.373
1996 54.284
1997 53.954
1998 53.534
1999 53.167
2000 52.886
2001 52.501
2002 52.197
2003 51.891
2004 51.491
2005 50.974
2006 50.543
2007 50.142
2008 49.771
2009 49.479
2010 49.323
2011 48.931
2012 48.584
2013 48.307
2014 48.088
2015 47.92
2016 47.9
2017 47.891
2018 47.911
2019 47.974
2020 48.084
2021 48.286
2022 48.524
2023 48.786
2024 49.07
2025 49.377
2026 49.777
2027 50.182
2028 50.584
2029 50.981
2030 51.368
2031 51.781
2032 52.16
2033 52.529
2034 52.921
2035 53.351
2036 53.832
2037 54.331
2038 54.825
2039 55.274
2040 55.653
2041 55.957
2042 56.192
2043 56.375
2044 56.527
2045 56.667
2046 56.763
2047 56.842
2048 56.931
2049 57.07
2050 57.281
2051 57.543
2052 57.861
2053 58.254
2054 58.735
2055 59.309
2056 59.925
2057 60.638
2058 61.407
2059 62.165
2060 62.885
2061 63.51
2062 64.089
2063 64.639
2064 65.172
2065 65.689
2066 66.099
2067 66.501
2068 66.895
2069 67.287
2070 67.693
2071 68.01
2072 68.344
2073 68.706
2074 69.105
2075 69.546
2076 69.882
2077 70.262
2078 70.684
2079 71.14
2080 71.621
2081 71.959
2082 72.328
2083 72.732
2084 73.164
2085 73.617
2086 73.92
2087 74.271
2088 74.651
2089 75.05
2090 75.472
2091 75.752
2092 76.062
2093 76.41
2094 76.801
2095 77.235
2096 77.494
2097 77.803
2098 78.15
2099 78.53
2100 78.939