Year Years 1950 31.074 1951 31.315 1952 31.794 1953 32.27 1954 32.744 1955 33.215 1956 33.684 1957 34.151 1958 34.617 1959 35.084 1960 35.553 1961 36.025 1962 36.503 1963 36.986 1964 37.474 1965 37.961 1966 38.441 1967 38.91 1968 39.37 1969 39.824 1970 40.278 1971 40.735 1972 41.206 1973 41.705 1974 42.242 1975 42.85 1976 43.561 1977 44.38 1978 45.288 1979 46.257 1980 47.234 1981 48.154 1982 48.962 1983 49.619 1984 50.106 1985 50.418 1986 50.571 1987 50.616 1988 50.601 1989 50.559 1990 50.516 1991 50.494 1992 50.498 1993 50.534 1994 50.613 1995 50.734 1996 50.887 1997 51.06 1998 51.249 1999 51.461 2000 51.712 2001 52.023 2002 52.409 2003 52.875 2004 53.421 2005 54.04 2006 54.721 2007 55.442 2008 56.178 2009 56.909 2010 57.616 2011 58.285 2012 58.912 2013 59.496 2014 60.035 2015 60.531 2016 60.992 2017 61.431 2018 61.858 2019 62.279 2020 62.697 2021 63.111 2022 63.518 2023 63.914 2024 64.3 2025 64.675 2026 65.04 2027 65.394 2028 65.739 2029 66.075 2030 66.401 2031 66.718 2032 67.026 2033 67.325 2034 67.616 2035 67.9 2036 68.176 2037 68.445 2038 68.707 2039 68.964 2040 69.214 2041 69.459 2042 69.697 2043 69.93 2044 70.158 2045 70.38 2046 70.597 2047 70.808 2048 71.016 2049 71.218 2050 71.418 2051 71.615 2052 71.81 2053 72.003 2054 72.194 2055 72.383 2056 72.568 2057 72.748 2058 72.925 2059 73.096 2060 73.265 2061 73.43 2062 73.595 2063 73.759 2064 73.922 2065 74.086 2066 74.248 2067 74.409 2068 74.568 2069 74.724 2070 74.877 2071 75.029 2072 75.178 2073 75.327 2074 75.474 2075 75.621 2076 75.765 2077 75.908 2078 76.049 2079 76.189 2080 76.328 2081 76.466 2082 76.605 2083 76.744 2084 76.884 2085 77.023 2086 77.162 2087 77.299 2088 77.434 2089 77.568 2090 77.699 2091 77.829 2092 77.958 2093 78.087 2094 78.215 2095 78.345 2096 78.474 2097 78.604 2098 78.735 2099 78.866