Year Number
1950 69.175
1951 68.597
1952 65.69
1953 62.881
1954 61.454
1955 61.643
1956 62.538
1957 64.636
1958 67.379
1959 70.044
1960 72.227
1961 74.42
1962 76.281
1963 77.707
1964 78.633
1965 78.978
1966 79.303
1967 78.886
1968 77.89
1969 76.628
1970 75.3
1971 73.422
1972 71.931
1973 70.626
1974 69.188
1975 67.505
1976 66.557
1977 65.353
1978 64.129
1979 63.185
1980 62.592
1981 61.774
1982 61.262
1983 60.995
1984 60.797
1985 60.559
1986 60.285
1987 60.043
1988 59.854
1989 59.713
1990 59.545
1991 59.87
1992 59.907
1993 59.683
1994 59.224
1995 58.54
1996 57.414
1997 56.152
1998 54.849
1999 53.627
2000 52.588
2001 51.402
2002 50.471
2003 49.626
2004 48.713
2005 47.702
2006 47.035
2007 46.272
2008 45.534
2009 45.023
2010 44.884
2011 45.621
2012 46.557
2013 47.687
2014 48.949
2015 50.27
2016 51.777
2017 53.291
2018 54.696
2019 55.872
2020 56.751
2021 57.1
2022 57.332
2023 57.362
2024 57.132
2025 56.663
2026 56.363
2027 55.782
2028 55.01
2029 54.188
2030 53.389
2031 52.681
2032 52.011
2033 51.421
2034 50.918
2035 50.514
2036 50.34
2037 50.257
2038 50.251
2039 50.303
2040 50.401
2041 50.661
2042 50.942
2043 51.245
2044 51.563
2045 51.886
2046 52.321
2047 52.715
2048 53.103
2049 53.54
2050 54.054
2051 54.738
2052 55.453
2053 56.133
2054 56.689
2055 57.058
2056 57.351
2057 57.485
2058 57.434
2059 57.169
2060 56.694
2061 56.13
2062 55.397
2063 54.553
2064 53.669
2065 52.796
2066 52.051
2067 51.32
2068 50.668
2069 50.174
2070 49.887
2071 49.916
2072 50.119
2073 50.484
2074 50.993
2075 51.629
2076 52.508
2077 53.498
2078 54.542
2079 55.55
2080 56.451
2081 57.32
2082 58.076
2083 58.724
2084 59.279
2085 59.754
2086 60.182
2087 60.528
2088 60.792
2089 60.979
2090 61.098
2091 61.148
2092 61.138
2093 61.086
2094 61.017
2095 60.951
2096 60.878
2097 60.805
2098 60.751
2099 60.737
2100 60.777