Year Years 1950 66.94 1951 67.318 1952 68.044 1953 68.708 1954 69.311 1955 69.852 1956 70.333 1957 70.755 1958 71.121 1959 71.437 1960 71.707 1961 71.941 1962 72.147 1963 72.334 1964 72.51 1965 72.68 1966 72.846 1967 73.007 1968 73.163 1969 73.316 1970 73.47 1971 73.626 1972 73.784 1973 73.947 1974 74.117 1975 74.3 1976 74.501 1977 74.72 1978 74.957 1979 75.209 1980 75.469 1981 75.729 1982 75.983 1983 76.225 1984 76.452 1985 76.667 1986 76.874 1987 77.08 1988 77.288 1989 77.498 1990 77.703 1991 77.892 1992 78.06 1993 78.208 1994 78.341 1995 78.471 1996 78.614 1997 78.785 1998 78.992 1999 79.24 2000 79.527 2001 79.85 2002 80.194 2003 80.545 2004 80.893 2005 81.228 2006 81.542 2007 81.831 2008 82.096 2009 82.334 2010 82.545 2011 82.73 2012 82.896 2013 83.05 2014 83.195 2015 83.334 2016 83.471 2017 83.605 2018 83.737 2019 83.87 2020 84.003 2021 84.138 2022 84.274 2023 84.409 2024 84.543 2025 84.677 2026 84.811 2027 84.944 2028 85.076 2029 85.207 2030 85.337 2031 85.467 2032 85.597 2033 85.726 2034 85.854 2035 85.982 2036 86.11 2037 86.236 2038 86.362 2039 86.486 2040 86.611 2041 86.735 2042 86.86 2043 86.985 2044 87.11 2045 87.236 2046 87.361 2047 87.487 2048 87.611 2049 87.735 2050 87.857 2051 87.979 2052 88.1 2053 88.221 2054 88.341 2055 88.461 2056 88.581 2057 88.701 2058 88.821 2059 88.941 2060 89.061 2061 89.181 2062 89.3 2063 89.419 2064 89.538 2065 89.656 2066 89.774 2067 89.892 2068 90.009 2069 90.127 2070 90.245 2071 90.363 2072 90.481 2073 90.599 2074 90.717 2075 90.835 2076 90.953 2077 91.071 2078 91.188 2079 91.306 2080 91.424 2081 91.543 2082 91.662 2083 91.782 2084 91.902 2085 92.022 2086 92.141 2087 92.259 2088 92.376 2089 92.492 2090 92.607 2091 92.721 2092 92.834 2093 92.948 2094 93.063 2095 93.178 2096 93.294 2097 93.411 2098 93.528 2099 93.646