Year Years 1950 43.576 1951 43.689 1952 43.952 1953 44.284 1954 44.685 1955 45.156 1956 45.693 1957 46.291 1958 46.942 1959 47.631 1960 48.34 1961 49.05 1962 49.742 1963 50.4 1964 51.019 1965 51.601 1966 52.158 1967 52.707 1968 53.263 1969 53.828 1970 54.401 1971 54.974 1972 55.539 1973 56.088 1974 56.62 1975 57.141 1976 57.664 1977 58.193 1978 58.726 1979 59.249 1980 59.747 1981 60.202 1982 60.591 1983 60.897 1984 61.103 1985 61.196 1986 61.17 1987 61.033 1988 60.793 1989 60.455 1990 60.011 1991 59.446 1992 58.772 1993 58.018 1994 57.222 1995 56.42 1996 55.647 1997 54.945 1998 54.365 1999 53.962 2000 53.802 2001 53.947 2002 54.401 2003 55.148 2004 56.161 2005 57.409 2006 58.846 2007 60.395 2008 61.969 2009 63.495 2010 64.898 2011 66.12 2012 67.152 2013 67.994 2014 68.645 2015 69.117 2016 69.44 2017 69.669 2018 69.854 2019 70.025 2020 70.205 2021 70.404 2022 70.614 2023 70.827 2024 71.05 2025 71.285 2026 71.531 2027 71.783 2028 72.036 2029 72.289 2030 72.539 2031 72.787 2032 73.031 2033 73.27 2034 73.504 2035 73.729 2036 73.946 2037 74.153 2038 74.352 2039 74.544 2040 74.73 2041 74.914 2042 75.098 2043 75.283 2044 75.472 2045 75.665 2046 75.862 2047 76.061 2048 76.262 2049 76.464 2050 76.665 2051 76.864 2052 77.06 2053 77.254 2054 77.444 2055 77.63 2056 77.814 2057 77.995 2058 78.174 2059 78.351 2060 78.526 2061 78.699 2062 78.87 2063 79.038 2064 79.202 2065 79.362 2066 79.517 2067 79.666 2068 79.809 2069 79.947 2070 80.079 2071 80.208 2072 80.333 2073 80.456 2074 80.579 2075 80.7 2076 80.821 2077 80.942 2078 81.061 2079 81.18 2080 81.298 2081 81.416 2082 81.532 2083 81.648 2084 81.762 2085 81.877 2086 81.991 2087 82.104 2088 82.218 2089 82.332 2090 82.446 2091 82.56 2092 82.673 2093 82.786 2094 82.899 2095 83.012 2096 83.124 2097 83.235 2098 83.346 2099 83.456