Year Number 1950 92.858 1951 92.353 1952 91.235 1953 90.061 1954 89.122 1955 88.409 1956 88.242 1957 88.405 1958 88.544 1959 88.293 1960 87.513 1961 87.418 1962 86.529 1963 85.195 1964 83.894 1965 82.83 1966 81.876 1967 81.231 1968 80.659 1969 79.791 1970 78.483 1971 77.532 1972 76.095 1973 74.406 1974 72.814 1975 71.49 1976 70.345 1977 69.541 1978 68.916 1979 68.231 1980 67.388 1981 66.974 1982 66.332 1983 65.571 1984 64.84 1985 64.188 1986 63.47 1987 62.719 1988 61.932 1989 61.092 1990 60.198 1991 59.161 1992 58.229 1993 57.313 1994 56.307 1995 55.17 1996 54.086 1997 52.829 1998 51.489 1999 50.243 2000 49.207 2001 48.642 2002 48.302 2003 48.14 2004 48.061 2005 48.016 2006 48.183 2007 48.293 2008 48.38 2009 48.509 2010 48.711 2011 49.204 2012 49.758 2013 50.318 2014 50.82 2015 51.233 2016 51.456 2017 51.66 2018 51.823 2019 51.932 2020 51.998 2021 52.144 2022 52.22 2023 52.263 2024 52.339 2025 52.489 2026 52.681 2027 52.955 2028 53.291 2029 53.657 2030 54.043 2031 54.47 2032 54.925 2033 55.401 2034 55.897 2035 56.417 2036 56.955 2037 57.487 2038 58.049 2039 58.689 2040 59.432 2041 60.251 2042 61.169 2043 62.127 2044 63.05 2045 63.897 2046 64.648 2047 65.334 2048 65.94 2049 66.451 2050 66.861 2051 67.125 2052 67.298 2053 67.403 2054 67.486 2055 67.587 2056 67.677 2057 67.811 2058 67.977 2059 68.158 2060 68.348 2061 68.504 2062 68.7 2063 68.951 2064 69.29 2065 69.748 2066 70.251 2067 70.872 2068 71.614 2069 72.467 2070 73.408 2071 74.33 2072 75.376 2073 76.484 2074 77.567 2075 78.582 2076 79.415 2077 80.199 2078 80.928 2079 81.624 2080 82.306 2081 82.785 2082 83.259 2083 83.724 2084 84.173 2085 84.598 2086 84.774 2087 84.968 2088 85.168 2089 85.384 2090 85.636 2091 85.685 2092 85.796 2093 85.982 2094 86.258 2095 86.624 2096 86.802 2097 87.112 2098 87.535 2099 88.041 2100 88.612