Year Years 1950 36.746 1951 36.888 1952 37.171 1953 37.452 1954 37.731 1955 38.008 1956 38.284 1957 38.56 1958 38.839 1959 39.123 1960 39.418 1961 39.727 1962 40.054 1963 40.401 1964 40.766 1965 41.146 1966 41.534 1967 41.925 1968 42.311 1969 42.693 1970 43.068 1971 43.437 1972 43.805 1973 44.176 1974 44.556 1975 44.951 1976 45.372 1977 45.819 1978 46.291 1979 46.781 1980 47.277 1981 47.765 1982 48.231 1983 48.667 1984 49.071 1985 49.447 1986 49.808 1987 50.166 1988 50.531 1989 50.903 1990 51.28 1991 51.661 1992 52.033 1993 52.384 1994 52.703 1995 52.971 1996 53.161 1997 53.274 1998 53.318 1999 53.313 2000 53.296 2001 53.312 2002 53.4 2003 53.582 2004 53.868 2005 54.25 2006 54.705 2007 55.195 2008 55.686 2009 56.163 2010 56.616 2011 57.047 2012 57.468 2013 57.886 2014 58.303 2015 58.719 2016 59.134 2017 59.548 2018 59.959 2019 60.367 2020 60.771 2021 61.171 2022 61.567 2023 61.958 2024 62.343 2025 62.722 2026 63.095 2027 63.463 2028 63.824 2029 64.179 2030 64.528 2031 64.871 2032 65.209 2033 65.541 2034 65.867 2035 66.188 2036 66.503 2037 66.812 2038 67.116 2039 67.413 2040 67.704 2041 67.989 2042 68.267 2043 68.54 2044 68.807 2045 69.067 2046 69.322 2047 69.571 2048 69.815 2049 70.054 2050 70.288 2051 70.517 2052 70.743 2053 70.965 2054 71.183 2055 71.399 2056 71.611 2057 71.819 2058 72.025 2059 72.227 2060 72.426 2061 72.623 2062 72.817 2063 73.008 2064 73.197 2065 73.384 2066 73.569 2067 73.753 2068 73.934 2069 74.114 2070 74.291 2071 74.465 2072 74.635 2073 74.801 2074 74.963 2075 75.123 2076 75.281 2077 75.438 2078 75.595 2079 75.751 2080 75.906 2081 76.06 2082 76.212 2083 76.361 2084 76.507 2085 76.651 2086 76.793 2087 76.934 2088 77.076 2089 77.218 2090 77.359 2091 77.5 2092 77.64 2093 77.778 2094 77.915 2095 78.049 2096 78.18 2097 78.309 2098 78.435 2099 78.559