Year Years 1950 60.887 1951 61.73 1952 63.35 1953 64.843 1954 66.206 1955 67.441 1956 68.55 1957 69.535 1958 70.401 1959 71.158 1960 71.816 1961 72.388 1962 72.889 1963 73.332 1964 73.729 1965 74.083 1966 74.394 1967 74.657 1968 74.87 1969 75.038 1970 75.165 1971 75.254 1972 75.31 1973 75.34 1974 75.354 1975 75.358 1976 75.358 1977 75.358 1978 75.361 1979 75.372 1980 75.399 1981 75.449 1982 75.52 1983 75.606 1984 75.698 1985 75.78 1986 75.829 1987 75.834 1988 75.792 1989 75.71 1990 75.607 1991 75.505 1992 75.432 1993 75.41 1994 75.449 1995 75.559 1996 75.743 1997 75.983 1998 76.259 1999 76.555 2000 76.845 2001 77.101 2002 77.311 2003 77.469 2004 77.581 2005 77.665 2006 77.752 2007 77.873 2008 78.046 2009 78.272 2010 78.54 2011 78.827 2012 79.105 2013 79.35 2014 79.554 2015 79.717 2016 79.844 2017 79.954 2018 80.06 2019 80.169 2020 80.282 2021 80.401 2022 80.521 2023 80.641 2024 80.76 2025 80.878 2026 80.996 2027 81.112 2028 81.228 2029 81.343 2030 81.457 2031 81.571 2032 81.684 2033 81.797 2034 81.91 2035 82.022 2036 82.134 2037 82.245 2038 82.356 2039 82.467 2040 82.577 2041 82.687 2042 82.796 2043 82.904 2044 83.011 2045 83.117 2046 83.223 2047 83.328 2048 83.432 2049 83.536 2050 83.64 2051 83.744 2052 83.849 2053 83.954 2054 84.059 2055 84.165 2056 84.271 2057 84.377 2058 84.483 2059 84.589 2060 84.693 2061 84.796 2062 84.898 2063 84.998 2064 85.097 2065 85.196 2066 85.294 2067 85.393 2068 85.493 2069 85.593 2070 85.694 2071 85.796 2072 85.898 2073 85.999 2074 86.1 2075 86.201 2076 86.301 2077 86.401 2078 86.5 2079 86.6 2080 86.7 2081 86.8 2082 86.9 2083 86.999 2084 87.099 2085 87.199 2086 87.3 2087 87.401 2088 87.503 2089 87.605 2090 87.707 2091 87.809 2092 87.909 2093 88.009 2094 88.106 2095 88.202 2096 88.295 2097 88.387 2098 88.476 2099 88.564