Year Years 1950 26.748 1951 26.825 1952 26.989 1953 27.168 1954 27.363 1955 27.572 1956 27.796 1957 28.031 1958 28.276 1959 28.525 1960 28.773 1961 29.018 1962 29.264 1963 29.52 1964 29.806 1965 30.168 1966 30.657 1967 31.296 1968 32.085 1969 33.006 1970 34.013 1971 35.048 1972 36.045 1973 36.949 1974 37.728 1975 38.376 1976 38.909 1977 39.363 1978 39.763 1979 40.106 1980 40.38 1981 40.566 1982 40.645 1983 40.605 1984 40.441 1985 40.137 1986 39.677 1987 39.077 1988 38.377 1989 37.622 1990 36.87 1991 36.182 1992 35.61 1993 35.196 1994 34.977 1995 34.976 1996 35.2 1997 35.614 1998 36.179 1999 36.874 2000 37.676 2001 38.565 2002 39.519 2003 40.514 2004 41.527 2005 42.546 2006 43.568 2007 44.597 2008 45.622 2009 46.624 2010 47.572 2011 48.435 2012 49.197 2013 49.854 2014 50.407 2015 50.867 2016 51.258 2017 51.61 2018 51.952 2019 52.298 2020 52.657 2021 53.031 2022 53.407 2023 53.777 2024 54.142 2025 54.502 2026 54.856 2027 55.205 2028 55.549 2029 55.888 2030 56.221 2031 56.547 2032 56.866 2033 57.178 2034 57.482 2035 57.778 2036 58.067 2037 58.349 2038 58.625 2039 58.894 2040 59.157 2041 59.414 2042 59.663 2043 59.905 2044 60.14 2045 60.368 2046 60.588 2047 60.8 2048 61.006 2049 61.205 2050 61.397 2051 61.585 2052 61.767 2053 61.945 2054 62.118 2055 62.288 2056 62.453 2057 62.613 2058 62.769 2059 62.92 2060 63.068 2061 63.212 2062 63.354 2063 63.494 2064 63.632 2065 63.768 2066 63.904 2067 64.038 2068 64.171 2069 64.301 2070 64.428 2071 64.551 2072 64.669 2073 64.782 2074 64.89 2075 64.994 2076 65.096 2077 65.195 2078 65.294 2079 65.394 2080 65.495 2081 65.597 2082 65.701 2083 65.806 2084 65.911 2085 66.015 2086 66.117 2087 66.217 2088 66.314 2089 66.409 2090 66.5 2091 66.59 2092 66.679 2093 66.767 2094 66.856 2095 66.944 2096 67.034 2097 67.124 2098 67.215 2099 67.307