Year Years 1950 55.931 1951 56.682 1952 58.128 1953 59.461 1954 60.682 1955 61.79 1956 62.785 1957 63.667 1958 64.437 1959 65.095 1960 65.641 1961 66.078 1962 66.41 1963 66.646 1964 66.797 1965 66.871 1966 66.878 1967 66.826 1968 66.726 1969 66.59 1970 66.424 1971 66.228 1972 66.005 1973 65.76 1974 65.503 1975 65.24 1976 64.973 1977 64.711 1978 64.467 1979 64.26 1980 64.131 1981 64.124 1982 64.251 1983 64.497 1984 64.831 1985 65.186 1986 65.481 1987 65.647 1988 65.641 1989 65.452 1990 65.092 1991 64.601 1992 64.051 1993 63.511 1994 63.019 1995 62.604 1996 62.282 1997 62.041 1998 61.867 1999 61.76 2000 61.704 2001 61.675 2002 61.66 2003 61.656 2004 61.675 2005 61.756 2006 61.953 2007 62.295 2008 62.787 2009 63.41 2010 64.113 2011 64.83 2012 65.491 2013 66.046 2014 66.474 2015 66.774 2016 66.97 2017 67.113 2018 67.246 2019 67.388 2020 67.549 2021 67.729 2022 67.917 2023 68.104 2024 68.29 2025 68.476 2026 68.662 2027 68.848 2028 69.034 2029 69.221 2030 69.409 2031 69.597 2032 69.786 2033 69.976 2034 70.166 2035 70.356 2036 70.545 2037 70.734 2038 70.922 2039 71.109 2040 71.296 2041 71.482 2042 71.668 2043 71.854 2044 72.041 2045 72.228 2046 72.416 2047 72.605 2048 72.794 2049 72.983 2050 73.173 2051 73.363 2052 73.555 2053 73.747 2054 73.94 2055 74.133 2056 74.327 2057 74.521 2058 74.715 2059 74.909 2060 75.103 2061 75.297 2062 75.493 2063 75.689 2064 75.887 2065 76.086 2066 76.288 2067 76.491 2068 76.696 2069 76.901 2070 77.106 2071 77.309 2072 77.509 2073 77.706 2074 77.899 2075 78.088 2076 78.273 2077 78.453 2078 78.63 2079 78.804 2080 78.976 2081 79.145 2082 79.312 2083 79.478 2084 79.641 2085 79.802 2086 79.96 2087 80.114 2088 80.264 2089 80.41 2090 80.552 2091 80.691 2092 80.827 2093 80.961 2094 81.092 2095 81.223 2096 81.351 2097 81.478 2098 81.604 2099 81.728