Year Number
1950 77.469
1951 75.745
1952 74.201
1953 72.7
1954 71.238
1955 69.887
1956 69.949
1957 69.772
1958 69.543
1959 69.428
1960 69.486
1961 69.562
1962 69.883
1963 70.235
1964 70.231
1965 69.626
1966 69.776
1967 69.372
1968 68.542
1969 67.669
1970 67.072
1971 65.623
1972 64.478
1973 63.5
1974 62.409
1975 61.063
1976 60.103
1977 58.834
1978 57.4
1979 56.043
1980 54.892
1981 53.619
1982 52.633
1983 51.849
1984 51.113
1985 50.358
1986 50.512
1987 50.533
1988 50.5
1989 50.566
1990 50.792
1991 50.282
1992 50.047
1993 49.972
1994 49.896
1995 49.748
1996 49.821
1997 49.754
1998 49.578
1999 49.394
2000 49.282
2001 49.394
2002 49.565
2003 49.763
2004 49.868
2005 49.794
2006 49.663
2007 49.411
2008 49.057
2009 48.675
2010 48.316
2011 48.109
2012 47.824
2013 47.578
2014 47.517
2015 47.71
2016 48.103
2017 48.778
2018 49.598
2019 50.338
2020 50.876
2021 51.388
2022 51.689
2023 51.866
2024 52.069
2025 52.386
2026 52.851
2027 53.399
2028 53.988
2029 54.509
2030 54.916
2031 55.284
2032 55.552
2033 55.757
2034 55.963
2035 56.22
2036 56.547
2037 56.908
2038 57.292
2039 57.682
2040 58.071
2041 58.5
2042 58.906
2043 59.325
2044 59.805
2045 60.366
2046 61.066
2047 61.866
2048 62.688
2049 63.415
2050 63.985
2051 64.495
2052 64.854
2053 65.128
2054 65.423
2055 65.791
2056 66.259
2057 66.809
2058 67.411
2059 68.025
2060 68.637
2061 69.269
2062 69.915
2063 70.566
2064 71.2
2065 71.794
2066 72.319
2067 72.807
2068 73.276
2069 73.757
2070 74.275
2071 74.792
2072 75.357
2073 75.951
2074 76.517
2075 77.008
2076 77.381
2077 77.726
2078 78.03
2079 78.292
2080 78.531
2081 78.698
2082 78.861
2083 79.03
2084 79.212
2085 79.395
2086 79.447
2087 79.537
2088 79.653
2089 79.788
2090 79.938
2091 79.98
2092 80.081
2093 80.23
2094 80.412
2095 80.619
2096 80.725
2097 80.878
2098 81.068
2099 81.293
2100 81.552