Year Years 1950 45.646 1951 46.014 1952 46.749 1953 47.478 1954 48.203 1955 48.923 1956 49.639 1957 50.349 1958 51.055 1959 51.758 1960 52.456 1961 53.152 1962 53.844 1963 54.533 1964 55.219 1965 55.899 1966 56.574 1967 57.243 1968 57.904 1969 58.555 1970 59.199 1971 59.835 1972 60.464 1973 61.084 1974 61.693 1975 62.285 1976 62.854 1977 63.397 1978 63.913 1979 64.4 1980 64.863 1981 65.306 1982 65.735 1983 66.154 1984 66.561 1985 66.954 1986 67.329 1987 67.678 1988 67.999 1989 68.292 1990 68.555 1991 68.79 1992 69.003 1993 69.199 1994 69.381 1995 69.555 1996 69.723 1997 69.886 1998 70.048 1999 70.209 2000 70.37 2001 70.531 2002 70.692 2003 70.849 2004 71.004 2005 71.155 2006 71.304 2007 71.45 2008 71.594 2009 71.735 2010 71.874 2011 72.01 2012 72.143 2013 72.274 2014 72.403 2015 72.532 2016 72.66 2017 72.789 2018 72.919 2019 73.05 2020 73.183 2021 73.317 2022 73.452 2023 73.587 2024 73.721 2025 73.856 2026 73.989 2027 74.121 2028 74.253 2029 74.385 2030 74.517 2031 74.65 2032 74.785 2033 74.922 2034 75.06 2035 75.201 2036 75.343 2037 75.486 2038 75.628 2039 75.771 2040 75.913 2041 76.056 2042 76.199 2043 76.343 2044 76.487 2045 76.633 2046 76.779 2047 76.925 2048 77.072 2049 77.219 2050 77.367 2051 77.516 2052 77.665 2053 77.816 2054 77.969 2055 78.122 2056 78.275 2057 78.429 2058 78.583 2059 78.738 2060 78.894 2061 79.052 2062 79.213 2063 79.377 2064 79.543 2065 79.712 2066 79.882 2067 80.051 2068 80.22 2069 80.387 2070 80.553 2071 80.717 2072 80.879 2073 81.041 2074 81.203 2075 81.365 2076 81.528 2077 81.692 2078 81.857 2079 82.022 2080 82.186 2081 82.349 2082 82.509 2083 82.665 2084 82.817 2085 82.966 2086 83.112 2087 83.255 2088 83.396 2089 83.535 2090 83.672 2091 83.806 2092 83.937 2093 84.064 2094 84.188 2095 84.306 2096 84.421 2097 84.531 2098 84.636 2099 84.737