Year Years 1950 42.393 1951 42.52 1952 42.777 1953 43.037 1954 43.302 1955 43.569 1956 43.84 1957 44.115 1958 44.392 1959 44.67 1960 44.949 1961 45.227 1962 45.503 1963 45.777 1964 46.05 1965 46.322 1966 46.597 1967 46.876 1968 47.161 1969 47.448 1970 47.736 1971 48.017 1972 48.289 1973 48.55 1974 48.801 1975 49.044 1976 49.279 1977 49.515 1978 49.759 1979 50.018 1980 50.301 1981 50.619 1982 50.973 1983 51.364 1984 51.794 1985 52.258 1986 52.753 1987 53.27 1988 53.799 1989 54.335 1990 54.872 1991 55.409 1992 55.945 1993 56.482 1994 57.017 1995 57.554 1996 58.092 1997 58.634 1998 59.183 1999 59.737 2000 60.297 2001 60.864 2002 61.436 2003 62.008 2004 62.579 2005 63.142 2006 63.695 2007 64.234 2008 64.756 2009 65.259 2010 65.74 2011 66.197 2012 66.633 2013 67.051 2014 67.45 2015 67.836 2016 68.208 2017 68.571 2018 68.927 2019 69.276 2020 69.618 2021 69.954 2022 70.282 2023 70.601 2024 70.91 2025 71.21 2026 71.503 2027 71.788 2028 72.068 2029 72.341 2030 72.609 2031 72.872 2032 73.128 2033 73.378 2034 73.623 2035 73.862 2036 74.095 2037 74.323 2038 74.546 2039 74.764 2040 74.978 2041 75.188 2042 75.392 2043 75.593 2044 75.788 2045 75.98 2046 76.168 2047 76.352 2048 76.533 2049 76.711 2050 76.886 2051 77.059 2052 77.228 2053 77.395 2054 77.56 2055 77.723 2056 77.884 2057 78.043 2058 78.2 2059 78.356 2060 78.511 2061 78.664 2062 78.817 2063 78.968 2064 79.119 2065 79.267 2066 79.414 2067 79.558 2068 79.699 2069 79.838 2070 79.976 2071 80.111 2072 80.246 2073 80.381 2074 80.515 2075 80.649 2076 80.782 2077 80.913 2078 81.043 2079 81.171 2080 81.297 2081 81.424 2082 81.55 2083 81.677 2084 81.805 2085 81.932 2086 82.06 2087 82.186 2088 82.31 2089 82.433 2090 82.554 2091 82.674 2092 82.793 2093 82.911 2094 83.029 2095 83.146 2096 83.264 2097 83.381 2098 83.499 2099 83.616