Year Number
1950 53.3
1951 54.784
1952 56.015
1953 57.286
1954 58.61
1955 59.868
1956 60.778
1957 61.784
1958 62.665
1959 63.216
1960 63.357
1961 63.597
1962 63.372
1963 62.858
1964 62.305
1965 61.848
1966 61.266
1967 60.749
1968 60.333
1969 59.925
1970 59.406
1971 58.984
1972 58.545
1973 58.07
1974 57.505
1975 56.816
1976 56.478
1977 55.782
1978 54.923
1979 54.143
1980 53.55
1981 52.702
1982 52.204
1983 51.904
1984 51.574
1985 51.131
1986 50.95
1987 50.538
1988 50.043
1989 49.683
1990 49.536
1991 49.518
1992 49.702
1993 49.977
1994 50.167
1995 50.193
1996 50.229
1997 50.132
1998 49.954
1999 49.792
2000 49.689
2001 49.39
2002 49.131
2003 48.914
2004 48.73
2005 48.596
2006 48.256
2007 48.01
2008 47.913
2009 47.969
2010 48.156
2011 48.622
2012 49.09
2013 49.614
2014 50.231
2015 50.927
2016 51.726
2017 52.627
2018 53.564
2019 54.437
2020 55.199
2021 56.03
2022 56.699
2023 57.269
2024 57.85
2025 58.492
2026 59.056
2027 59.71
2028 60.372
2029 60.915
2030 61.276
2031 61.465
2032 61.486
2033 61.423
2034 61.415
2035 61.539
2036 61.701
2037 61.997
2038 62.368
2039 62.7
2040 62.919
2041 62.971
2042 62.952
2043 62.92
2044 62.977
2045 63.195
2046 63.489
2047 63.927
2048 64.482
2049 65.093
2050 65.712
2051 66.229
2052 66.772
2053 67.328
2054 67.875
2055 68.395
2056 68.776
2057 69.155
2058 69.5
2059 69.79
2060 70.028
2061 70.088
2062 70.106
2063 70.121
2064 70.152
2065 70.189
2066 70.066
2067 69.996
2068 69.958
2069 69.968
2070 70.07
2071 70.106
2072 70.229
2073 70.463
2074 70.794
2075 71.177
2076 71.376
2077 71.656
2078 71.999
2079 72.4
2080 72.874
2081 73.224
2082 73.66
2083 74.167
2084 74.719
2085 75.294
2086 75.662
2087 76.063
2088 76.492
2089 76.949
2090 77.435
2091 77.708
2092 78.01
2093 78.347
2094 78.723
2095 79.139
2096 79.314
2097 79.537
2098 79.813
2099 80.145
2100 80.53