Year Years 1950 55.946 1951 56.126 1952 56.482 1953 56.83 1954 57.169 1955 57.501 1956 57.824 1957 58.141 1958 58.454 1959 58.764 1960 59.075 1961 59.392 1962 59.716 1963 60.051 1964 60.395 1965 60.75 1966 61.117 1967 61.491 1968 61.864 1969 62.227 1970 62.567 1971 62.866 1972 63.117 1973 63.323 1974 63.488 1975 63.628 1976 63.759 1977 63.903 1978 64.079 1979 64.294 1980 64.559 1981 64.877 1982 65.235 1983 65.619 1984 66.019 1985 66.42 1986 66.805 1987 67.165 1988 67.493 1989 67.785 1990 68.046 1991 68.286 1992 68.518 1993 68.751 1994 68.99 1995 69.234 1996 69.478 1997 69.714 1998 69.937 1999 70.144 2000 70.336 2001 70.513 2002 70.679 2003 70.836 2004 70.986 2005 71.131 2006 71.27 2007 71.404 2008 71.534 2009 71.662 2010 71.791 2011 71.923 2012 72.06 2013 72.202 2014 72.349 2015 72.502 2016 72.658 2017 72.816 2018 72.973 2019 73.129 2020 73.283 2021 73.435 2022 73.587 2023 73.738 2024 73.888 2025 74.037 2026 74.183 2027 74.326 2028 74.467 2029 74.604 2030 74.74 2031 74.874 2032 75.008 2033 75.142 2034 75.277 2035 75.412 2036 75.547 2037 75.682 2038 75.815 2039 75.947 2040 76.078 2041 76.208 2042 76.336 2043 76.464 2044 76.592 2045 76.72 2046 76.849 2047 76.979 2048 77.109 2049 77.239 2050 77.369 2051 77.498 2052 77.624 2053 77.748 2054 77.87 2055 77.99 2056 78.107 2057 78.224 2058 78.34 2059 78.457 2060 78.574 2061 78.693 2062 78.811 2063 78.931 2064 79.05 2065 79.17 2066 79.29 2067 79.41 2068 79.529 2069 79.648 2070 79.767 2071 79.884 2072 80.001 2073 80.118 2074 80.235 2075 80.351 2076 80.467 2077 80.583 2078 80.699 2079 80.815 2080 80.931 2081 81.047 2082 81.162 2083 81.277 2084 81.392 2085 81.507 2086 81.62 2087 81.733 2088 81.846 2089 81.959 2090 82.071 2091 82.183 2092 82.295 2093 82.406 2094 82.518 2095 82.63 2096 82.742 2097 82.854 2098 82.966 2099 83.078