Year Number
1950 68.779
1951 68.599
1952 68.83
1953 69.123
1954 68.967
1955 68.221
1956 68.14
1957 67.308
1958 66.265
1959 65.673
1960 65.871
1961 65.981
1962 67.445
1963 69.612
1964 71.494
1965 72.614
1966 74.818
1967 75.551
1968 75.529
1969 75.806
1970 76.8
1971 76.974
1972 78.076
1973 79.433
1974 79.943
1975 79.08
1976 77.732
1977 75.008
1978 71.477
1979 68.036
1980 65.128
1981 61.92
1982 59.551
1983 57.691
1984 55.862
1985 53.914
1986 52.463
1987 50.807
1988 49.19
1989 47.923
1990 47.098
1991 46.708
1992 46.477
1993 46.416
1994 46.469
1995 46.575
1996 46.376
1997 46.434
1998 46.566
1999 46.561
2000 46.338
2001 46.047
2002 45.51
2003 44.843
2004 44.244
2005 43.811
2006 43.453
2007 43.251
2008 43.174
2009 43.149
2010 43.144
2011 43.081
2012 43.059
2013 43.092
2014 43.208
2015 43.427
2016 43.756
2017 44.187
2018 44.687
2019 45.2
2020 45.694
2021 46.056
2022 46.407
2023 46.848
2024 47.533
2025 48.565
2026 49.905
2027 51.584
2028 53.528
2029 55.601
2030 57.705
2031 59.753
2032 61.809
2033 63.888
2034 66.032
2035 68.26
2036 70.425
2037 72.67
2038 74.856
2039 76.767
2040 78.266
2041 79.177
2042 79.648
2043 79.843
2044 79.994
2045 80.238
2046 80.327
2047 80.515
2048 80.807
2049 81.257
2050 81.943
2051 82.643
2052 83.577
2053 84.73
2054 85.948
2055 87.046
2056 87.715
2057 88.34
2058 88.867
2059 89.314
2060 89.766
2061 90.044
2062 90.328
2063 90.672
2064 91.078
2065 91.498
2066 91.694
2067 91.985
2068 92.276
2069 92.532
2070 92.813
2071 92.887
2072 92.922
2073 93.032
2074 93.305
2075 93.711
2076 93.795
2077 94.013
2078 94.342
2079 94.713
2080 95.068
2081 95.099
2082 95.227
2083 95.367
2084 95.482
2085 95.623
2086 95.512
2087 95.422
2088 95.411
2089 95.513
2090 95.699
2091 95.548
2092 95.496
2093 95.516
2094 95.59
2095 95.723
2096 95.531
2097 95.432
2098 95.443
2099 95.546
2100 95.701