Year Years 1950 66.374 1951 66.541 1952 66.859 1953 67.147 1954 67.404 1955 67.631 1956 67.83 1957 68.001 1958 68.15 1959 68.281 1960 68.404 1961 68.525 1962 68.654 1963 68.796 1964 68.957 1965 69.133 1966 69.321 1967 69.513 1968 69.704 1969 69.894 1970 70.086 1971 70.288 1972 70.503 1973 70.732 1974 70.975 1975 71.222 1976 71.464 1977 71.694 1978 71.907 1979 72.101 1980 72.283 1981 72.46 1982 72.644 1983 72.838 1984 73.044 1985 73.254 1986 73.457 1987 73.643 1988 73.81 1989 73.962 1990 74.11 1991 74.27 1992 74.458 1993 74.681 1994 74.944 1995 75.242 1996 75.569 1997 75.91 1998 76.252 1999 76.59 2000 76.922 2001 77.248 2002 77.572 2003 77.897 2004 78.219 2005 78.535 2006 78.842 2007 79.136 2008 79.415 2009 79.68 2010 79.931 2011 80.172 2012 80.406 2013 80.636 2014 80.862 2015 81.084 2016 81.3 2017 81.508 2018 81.705 2019 81.892 2020 82.068 2021 82.233 2022 82.39 2023 82.539 2024 82.683 2025 82.822 2026 82.957 2027 83.089 2028 83.219 2029 83.347 2030 83.474 2031 83.602 2032 83.729 2033 83.856 2034 83.983 2035 84.111 2036 84.239 2037 84.367 2038 84.494 2039 84.621 2040 84.747 2041 84.873 2042 84.998 2043 85.122 2044 85.245 2045 85.367 2046 85.489 2047 85.61 2048 85.731 2049 85.852 2050 85.972 2051 86.091 2052 86.21 2053 86.329 2054 86.447 2055 86.565 2056 86.683 2057 86.802 2058 86.921 2059 87.04 2060 87.16 2061 87.28 2062 87.4 2063 87.519 2064 87.638 2065 87.756 2066 87.874 2067 87.991 2068 88.108 2069 88.224 2070 88.34 2071 88.456 2072 88.573 2073 88.69 2074 88.808 2075 88.926 2076 89.043 2077 89.16 2078 89.277 2079 89.392 2080 89.506 2081 89.62 2082 89.733 2083 89.847 2084 89.96 2085 90.074 2086 90.188 2087 90.304 2088 90.42 2089 90.537 2090 90.655 2091 90.773 2092 90.89 2093 91.007 2094 91.123 2095 91.238 2096 91.352 2097 91.465 2098 91.577 2099 91.687