Year Years 1950 60.426 1951 60.986 1952 62.068 1953 63.07 1954 63.994 1955 64.839 1956 65.601 1957 66.28 1958 66.87 1959 67.363 1960 67.75 1961 68.025 1962 68.184 1963 68.232 1964 68.184 1965 68.058 1966 67.875 1967 67.66 1968 67.44 1969 67.234 1970 67.064 1971 66.939 1972 66.856 1973 66.808 1974 66.792 1975 66.8 1976 66.821 1977 66.843 1978 66.855 1979 66.856 1980 66.844 1981 66.825 1982 66.807 1983 66.798 1984 66.803 1985 66.822 1986 66.854 1987 66.896 1988 66.95 1989 67.018 1990 67.107 1991 67.224 1992 67.373 1993 67.554 1994 67.765 1995 67.999 1996 68.25 1997 68.508 1998 68.763 1999 69.011 2000 69.246 2001 69.463 2002 69.667 2003 69.864 2004 70.059 2005 70.266 2006 70.5 2007 70.769 2008 71.073 2009 71.407 2010 71.756 2011 72.1 2012 72.419 2013 72.699 2014 72.935 2015 73.13 2016 73.294 2017 73.442 2018 73.589 2019 73.742 2020 73.904 2021 74.075 2022 74.25 2023 74.425 2024 74.6 2025 74.774 2026 74.948 2027 75.123 2028 75.298 2029 75.473 2030 75.648 2031 75.824 2032 76 2033 76.176 2034 76.353 2035 76.53 2036 76.709 2037 76.89 2038 77.073 2039 77.258 2040 77.445 2041 77.634 2042 77.824 2043 78.015 2044 78.205 2045 78.396 2046 78.586 2047 78.776 2048 78.965 2049 79.153 2050 79.34 2051 79.526 2052 79.71 2053 79.894 2054 80.075 2055 80.255 2056 80.432 2057 80.606 2058 80.777 2059 80.945 2060 81.109 2061 81.269 2062 81.425 2063 81.577 2064 81.725 2065 81.868 2066 82.009 2067 82.146 2068 82.279 2069 82.411 2070 82.54 2071 82.666 2072 82.79 2073 82.912 2074 83.032 2075 83.151 2076 83.268 2077 83.385 2078 83.5 2079 83.615 2080 83.729 2081 83.842 2082 83.955 2083 84.066 2084 84.175 2085 84.284 2086 84.391 2087 84.497 2088 84.602 2089 84.707 2090 84.811 2091 84.915 2092 85.019 2093 85.123 2094 85.228 2095 85.333 2096 85.439 2097 85.546 2098 85.653 2099 85.761