Year Years 1950 43.27 1951 43.473 1952 43.896 1953 44.353 1954 44.843 1955 45.367 1956 45.924 1957 46.513 1958 47.13 1959 47.772 1960 48.433 1961 49.108 1962 49.789 1963 50.471 1964 51.149 1965 51.819 1966 52.478 1967 53.13 1968 53.779 1969 54.427 1970 55.079 1971 55.738 1972 56.41 1973 57.095 1974 57.793 1975 58.505 1976 59.231 1977 59.966 1978 60.703 1979 61.435 1980 62.153 1981 62.849 1982 63.518 1983 64.158 1984 64.768 1985 65.35 1986 65.905 1987 66.441 1988 66.968 1989 67.494 1990 68.027 1991 68.58 1992 69.155 1993 69.748 1994 70.358 1995 70.975 1996 71.588 1997 72.182 1998 72.749 1999 73.284 2000 73.786 2001 74.26 2002 74.716 2003 75.157 2004 75.584 2005 75.992 2006 76.373 2007 76.722 2008 77.038 2009 77.321 2010 77.578 2011 77.817 2012 78.047 2013 78.275 2014 78.506 2015 78.742 2016 78.982 2017 79.22 2018 79.453 2019 79.681 2020 79.903 2021 80.119 2022 80.33 2023 80.537 2024 80.74 2025 80.939 2026 81.135 2027 81.328 2028 81.517 2029 81.703 2030 81.886 2031 82.067 2032 82.245 2033 82.42 2034 82.594 2035 82.765 2036 82.933 2037 83.099 2038 83.263 2039 83.425 2040 83.584 2041 83.74 2042 83.895 2043 84.047 2044 84.197 2045 84.346 2046 84.493 2047 84.639 2048 84.785 2049 84.929 2050 85.073 2051 85.217 2052 85.36 2053 85.502 2054 85.644 2055 85.784 2056 85.923 2057 86.061 2058 86.198 2059 86.334 2060 86.468 2061 86.602 2062 86.736 2063 86.869 2064 87.001 2065 87.133 2066 87.264 2067 87.395 2068 87.524 2069 87.651 2070 87.778 2071 87.904 2072 88.029 2073 88.153 2074 88.277 2075 88.401 2076 88.525 2077 88.65 2078 88.775 2079 88.9 2080 89.024 2081 89.146 2082 89.266 2083 89.385 2084 89.501 2085 89.616 2086 89.731 2087 89.847 2088 89.965 2089 90.084 2090 90.205 2091 90.327 2092 90.448 2093 90.568 2094 90.686 2095 90.802 2096 90.916 2097 91.027 2098 91.136 2099 91.243