Year Years 1950 63.02 1951 63.073 1952 63.191 1953 63.333 1954 63.499 1955 63.689 1956 63.9 1957 64.13 1958 64.372 1959 64.617 1960 64.852 1961 65.064 1962 65.242 1963 65.378 1964 65.469 1965 65.519 1966 65.533 1967 65.526 1968 65.515 1969 65.51 1970 65.518 1971 65.545 1972 65.592 1973 65.66 1974 65.752 1975 65.876 1976 66.034 1977 66.224 1978 66.443 1979 66.683 1980 66.938 1981 67.198 1982 67.456 1983 67.703 1984 67.934 1985 68.142 1986 68.322 1987 68.48 1988 68.621 1989 68.752 1990 68.881 1991 69.021 1992 69.179 1993 69.359 1994 69.566 1995 69.796 1996 70.045 1997 70.305 1998 70.565 1999 70.82 2000 71.065 2001 71.298 2002 71.518 2003 71.725 2004 71.921 2005 72.103 2006 72.273 2007 72.433 2008 72.585 2009 72.734 2010 72.881 2011 73.03 2012 73.183 2013 73.341 2014 73.506 2015 73.677 2016 73.854 2017 74.034 2018 74.217 2019 74.401 2020 74.586 2021 74.77 2022 74.954 2023 75.139 2024 75.324 2025 75.51 2026 75.698 2027 75.887 2028 76.078 2029 76.271 2030 76.466 2031 76.662 2032 76.859 2033 77.055 2034 77.252 2035 77.448 2036 77.645 2037 77.842 2038 78.041 2039 78.24 2040 78.439 2041 78.64 2042 78.841 2043 79.043 2044 79.243 2045 79.442 2046 79.639 2047 79.834 2048 80.025 2049 80.213 2050 80.398 2051 80.579 2052 80.757 2053 80.932 2054 81.103 2055 81.271 2056 81.434 2057 81.593 2058 81.747 2059 81.896 2060 82.041 2061 82.18 2062 82.315 2063 82.446 2064 82.575 2065 82.702 2066 82.827 2067 82.953 2068 83.078 2069 83.203 2070 83.328 2071 83.453 2072 83.577 2073 83.699 2074 83.82 2075 83.939 2076 84.057 2077 84.174 2078 84.291 2079 84.408 2080 84.524 2081 84.638 2082 84.751 2083 84.862 2084 84.972 2085 85.081 2086 85.19 2087 85.299 2088 85.41 2089 85.521 2090 85.634 2091 85.748 2092 85.862 2093 85.975 2094 86.087 2095 86.199 2096 86.309 2097 86.417 2098 86.525 2099 86.631