Year Number
1950 58.917
1951 59.117
1952 58.664
1953 58.424
1954 58.919
1955 60.308
1956 62.774
1957 65.855
1958 69.399
1959 73.116
1960 76.801
1961 80.545
1962 84.09
1963 87.291
1964 89.924
1965 91.811
1966 93.349
1967 93.915
1968 93.667
1969 92.929
1970 91.91
1971 90.285
1972 88.997
1973 87.818
1974 86.378
1975 84.513
1976 82.925
1977 80.825
1978 78.548
1979 76.571
1980 75.108
1981 73.95
1982 73.353
1983 73.191
1984 73.152
1985 73.045
1986 73.49
1987 73.708
1988 73.802
1989 73.933
1990 74.133
1991 74.87
1992 75.435
1993 75.774
1994 75.796
1995 75.459
1996 74.366
1997 73.042
1998 71.529
1999 69.831
2000 67.924
2001 66.328
2002 64.525
2003 62.453
2004 60.192
2005 57.923
2006 56.43
2007 55.002
2008 53.819
2009 53.002
2010 52.574
2011 52.635
2012 53.053
2013 53.725
2014 54.516
2015 55.348
2016 56.697
2017 57.782
2018 58.709
2019 59.623
2020 60.543
2021 60.696
2022 61.155
2023 61.618
2024 61.701
2025 61.269
2026 60.846
2027 59.917
2028 58.682
2029 57.477
2030 56.474
2031 55.566
2032 54.833
2033 54.27
2034 53.805
2035 53.402
2036 53.134
2037 52.939
2038 52.811
2039 52.741
2040 52.716
2041 52.745
2042 52.799
2043 52.881
2044 52.985
2045 53.104
2046 53.251
2047 53.385
2048 53.544
2049 53.78
2050 54.117
2051 54.573
2052 55.105
2053 55.649
2054 56.115
2055 56.447
2056 56.675
2057 56.782
2058 56.776
2059 56.674
2060 56.488
2061 56.239
2062 55.925
2063 55.55
2064 55.107
2065 54.601
2066 54.064
2067 53.488
2068 52.929
2069 52.462
2070 52.131
2071 51.955
2072 51.883
2073 51.949
2074 52.203
2075 52.664
2076 53.364
2077 54.259
2078 55.265
2079 56.24
2080 57.087
2081 57.853
2082 58.491
2083 59.019
2084 59.474
2085 59.886
2086 60.251
2087 60.567
2088 60.835
2089 61.054
2090 61.226
2091 61.315
2092 61.373
2093 61.414
2094 61.464
2095 61.545
2096 61.587
2097 61.657
2098 61.765
2099 61.925
2100 62.145