Year Number
1950 61.72
1951 61.261
1952 60.748
1953 60.653
1954 61.16
1955 62.287
1956 64.732
1957 67.502
1958 70.647
1959 74.224
1960 78.25
1961 82.756
1962 87.596
1963 92.446
1964 96.739
1965 100.08
1966 103.462
1967 105.378
1968 106.163
1969 106.428
1970 106.535
1971 105.097
1972 104.133
1973 103.403
1974 102.351
1975 100.68
1976 99.404
1977 97.351
1978 94.862
1979 92.514
1980 90.638
1981 89.204
1982 88.351
1983 87.947
1984 87.745
1985 87.627
1986 88.197
1987 88.75
1988 89.314
1989 89.88
1990 90.353
1991 91.751
1992 92.629
1993 93.06
1994 93.147
1995 92.916
1996 92.212
1997 91.441
1998 90.396
1999 88.825
2000 86.691
2001 84.203
2002 81.288
2003 78.195
2004 75.274
2005 72.697
2006 70.178
2007 68.102
2008 66.379
2009 64.872
2010 63.538
2011 62.902
2012 62.309
2013 61.738
2014 61.242
2015 60.885
2016 61.431
2017 61.875
2018 62.316
2019 62.816
2020 63.349
2021 63.576
2022 63.917
2023 64.216
2024 64.28
2025 64.039
2026 63.663
2027 63.031
2028 62.196
2029 61.272
2030 60.336
2031 59.414
2032 58.5
2033 57.624
2034 56.806
2035 56.069
2036 55.503
2037 55.019
2038 54.619
2039 54.299
2040 54.052
2041 53.957
2042 53.903
2043 53.902
2044 53.954
2045 54.049
2046 54.219
2047 54.382
2048 54.561
2049 54.79
2050 55.079
2051 55.413
2052 55.794
2053 56.158
2054 56.422
2055 56.542
2056 56.549
2057 56.436
2058 56.233
2059 55.988
2060 55.738
2061 55.517
2062 55.291
2063 55.056
2064 54.799
2065 54.518
2066 54.252
2067 53.971
2068 53.703
2069 53.474
2070 53.303
2071 53.21
2072 53.149
2073 53.147
2074 53.241
2075 53.449
2076 53.768
2077 54.177
2078 54.646
2079 55.124
2080 55.571
2081 55.995
2082 56.399
2083 56.768
2084 57.093
2085 57.375
2086 57.619
2087 57.82
2088 57.987
2089 58.127
2090 58.243
2091 58.318
2092 58.377
2093 58.432
2094 58.496
2095 58.585
2096 58.669
2097 58.773
2098 58.912
2099 59.101
2100 59.35