Year Years 1950 31.645 1951 31.807 1952 32.143 1953 32.502 1954 32.885 1955 33.291 1956 33.719 1957 34.167 1958 34.63 1959 35.102 1960 35.575 1961 36.041 1962 36.492 1963 36.922 1964 37.33 1965 37.72 1966 38.098 1967 38.474 1968 38.857 1969 39.252 1970 39.662 1971 40.091 1972 40.536 1973 40.991 1974 41.452 1975 41.916 1976 42.383 1977 42.846 1978 43.294 1979 43.715 1980 44.09 1981 44.398 1982 44.633 1983 44.792 1984 44.879 1985 44.901 1986 44.874 1987 44.819 1988 44.756 1989 44.699 1990 44.66 1991 44.641 1992 44.639 1993 44.653 1994 44.688 1995 44.744 1996 44.819 1997 44.913 1998 45.031 1999 45.181 2000 45.382 2001 45.655 2002 46.008 2003 46.44 2004 46.942 2005 47.493 2006 48.067 2007 48.637 2008 49.18 2009 49.685 2010 50.148 2011 50.577 2012 50.99 2013 51.401 2014 51.815 2015 52.235 2016 52.66 2017 53.087 2018 53.512 2019 53.936 2020 54.357 2021 54.777 2022 55.194 2023 55.61 2024 56.023 2025 56.435 2026 56.845 2027 57.253 2028 57.659 2029 58.062 2030 58.461 2031 58.854 2032 59.24 2033 59.619 2034 59.99 2035 60.353 2036 60.708 2037 61.057 2038 61.399 2039 61.735 2040 62.064 2041 62.386 2042 62.7 2043 63.006 2044 63.304 2045 63.594 2046 63.877 2047 64.152 2048 64.421 2049 64.682 2050 64.937 2051 65.186 2052 65.427 2053 65.662 2054 65.89 2055 66.111 2056 66.325 2057 66.532 2058 66.732 2059 66.926 2060 67.114 2061 67.298 2062 67.479 2063 67.656 2064 67.829 2065 68 2066 68.167 2067 68.33 2068 68.488 2069 68.642 2070 68.792 2071 68.939 2072 69.083 2073 69.225 2074 69.367 2075 69.506 2076 69.645 2077 69.782 2078 69.917 2079 70.051 2080 70.183 2081 70.314 2082 70.445 2083 70.576 2084 70.706 2085 70.838 2086 70.971 2087 71.106 2088 71.242 2089 71.379 2090 71.517 2091 71.654 2092 71.791 2093 71.925 2094 72.058 2095 72.188 2096 72.316 2097 72.441 2098 72.563 2099 72.683