Year Years 1950 31.228 1951 31.388 1952 31.704 1953 32.01 1954 32.307 1955 32.594 1956 32.874 1957 33.15 1958 33.427 1959 33.713 1960 34.019 1961 34.356 1962 34.735 1963 35.161 1964 35.634 1965 36.152 1966 36.705 1967 37.278 1968 37.86 1969 38.442 1970 39.015 1971 39.573 1972 40.118 1973 40.658 1974 41.197 1975 41.747 1976 42.324 1977 42.937 1978 43.592 1979 44.289 1980 45.02 1981 45.775 1982 46.539 1983 47.3 1984 48.053 1985 48.798 1986 49.539 1987 50.284 1988 51.038 1989 51.803 1990 52.575 1991 53.349 1992 54.121 1993 54.89 1994 55.656 1995 56.429 1996 57.216 1997 58.025 1998 58.856 1999 59.705 2000 60.566 2001 61.432 2002 62.289 2003 63.123 2004 63.923 2005 64.676 2006 65.374 2007 66.016 2008 66.604 2009 67.139 2010 67.626 2011 68.069 2012 68.481 2013 68.868 2014 69.237 2015 69.592 2016 69.933 2017 70.258 2018 70.567 2019 70.86 2020 71.14 2021 71.406 2022 71.659 2023 71.9 2024 72.131 2025 72.352 2026 72.564 2027 72.766 2028 72.959 2029 73.146 2030 73.327 2031 73.506 2032 73.682 2033 73.857 2034 74.031 2035 74.206 2036 74.381 2037 74.554 2038 74.726 2039 74.895 2040 75.062 2041 75.227 2042 75.389 2043 75.55 2044 75.709 2045 75.867 2046 76.025 2047 76.184 2048 76.342 2049 76.501 2050 76.66 2051 76.82 2052 76.979 2053 77.139 2054 77.297 2055 77.456 2056 77.614 2057 77.772 2058 77.93 2059 78.088 2060 78.246 2061 78.403 2062 78.559 2063 78.715 2064 78.871 2065 79.027 2066 79.184 2067 79.343 2068 79.504 2069 79.667 2070 79.832 2071 79.998 2072 80.165 2073 80.331 2074 80.497 2075 80.662 2076 80.826 2077 80.99 2078 81.153 2079 81.317 2080 81.479 2081 81.641 2082 81.801 2083 81.96 2084 82.117 2085 82.272 2086 82.425 2087 82.575 2088 82.723 2089 82.869 2090 83.014 2091 83.158 2092 83.301 2093 83.444 2094 83.587 2095 83.73 2096 83.873 2097 84.017 2098 84.162 2099 84.307