Year Years 1950 52.23 1951 52.33 1952 52.534 1953 52.749 1954 52.976 1955 53.214 1956 53.463 1957 53.725 1958 54.001 1959 54.293 1960 54.604 1961 54.936 1962 55.294 1963 55.68 1964 56.095 1965 56.543 1966 57.022 1967 57.532 1968 58.069 1969 58.631 1970 59.217 1971 59.827 1972 60.456 1973 61.103 1974 61.76 1975 62.425 1976 63.094 1977 63.765 1978 64.432 1979 65.087 1980 65.722 1981 66.329 1982 66.905 1983 67.45 1984 67.961 1985 68.442 1986 68.898 1987 69.336 1988 69.761 1989 70.174 1990 70.575 1991 70.962 1992 71.33 1993 71.677 1994 72.004 1995 72.314 1996 72.611 1997 72.897 1998 73.176 1999 73.449 2000 73.713 2001 73.968 2002 74.209 2003 74.435 2004 74.647 2005 74.845 2006 75.029 2007 75.203 2008 75.371 2009 75.537 2010 75.706 2011 75.883 2012 76.071 2013 76.271 2014 76.484 2015 76.708 2016 76.941 2017 77.179 2018 77.416 2019 77.653 2020 77.886 2021 78.117 2022 78.345 2023 78.573 2024 78.8 2025 79.027 2026 79.253 2027 79.48 2028 79.707 2029 79.934 2030 80.16 2031 80.387 2032 80.612 2033 80.836 2034 81.057 2035 81.273 2036 81.485 2037 81.69 2038 81.889 2039 82.081 2040 82.265 2041 82.441 2042 82.611 2043 82.774 2044 82.931 2045 83.083 2046 83.231 2047 83.374 2048 83.513 2049 83.65 2050 83.785 2051 83.917 2052 84.048 2053 84.176 2054 84.304 2055 84.43 2056 84.556 2057 84.68 2058 84.804 2059 84.928 2060 85.05 2061 85.17 2062 85.29 2063 85.407 2064 85.523 2065 85.637 2066 85.751 2067 85.866 2068 85.98 2069 86.095 2070 86.21 2071 86.326 2072 86.442 2073 86.558 2074 86.674 2075 86.788 2076 86.901 2077 87.012 2078 87.123 2079 87.232 2080 87.34 2081 87.449 2082 87.558 2083 87.669 2084 87.781 2085 87.894 2086 88.008 2087 88.123 2088 88.237 2089 88.351 2090 88.464 2091 88.576 2092 88.686 2093 88.794 2094 88.901 2095 89.006 2096 89.11 2097 89.211 2098 89.311 2099 89.409