Year Years 1950 69.77 1951 69.91 1952 70.185 1953 70.45 1954 70.705 1955 70.951 1956 71.187 1957 71.414 1958 71.631 1959 71.839 1960 72.038 1961 72.229 1962 72.413 1963 72.591 1964 72.764 1965 72.934 1966 73.101 1967 73.268 1968 73.434 1969 73.602 1970 73.773 1971 73.948 1972 74.128 1973 74.312 1974 74.501 1975 74.697 1976 74.899 1977 75.107 1978 75.32 1979 75.541 1980 75.77 1981 76.01 1982 76.261 1983 76.522 1984 76.791 1985 77.066 1986 77.343 1987 77.618 1988 77.889 1989 78.154 1990 78.413 1991 78.668 1992 78.919 1993 79.171 1994 79.423 1995 79.676 1996 79.93 1997 80.186 1998 80.441 1999 80.697 2000 80.952 2001 81.208 2002 81.462 2003 81.715 2004 81.963 2005 82.205 2006 82.438 2007 82.661 2008 82.873 2009 83.072 2010 83.257 2011 83.428 2012 83.586 2013 83.734 2014 83.873 2015 84.005 2016 84.133 2017 84.258 2018 84.382 2019 84.506 2020 84.632 2021 84.759 2022 84.887 2023 85.015 2024 85.144 2025 85.272 2026 85.399 2027 85.526 2028 85.652 2029 85.777 2030 85.902 2031 86.025 2032 86.149 2033 86.273 2034 86.396 2035 86.52 2036 86.644 2037 86.768 2038 86.892 2039 87.016 2040 87.14 2041 87.264 2042 87.389 2043 87.513 2044 87.637 2045 87.762 2046 87.885 2047 88.008 2048 88.13 2049 88.251 2050 88.372 2051 88.491 2052 88.611 2053 88.731 2054 88.85 2055 88.97 2056 89.09 2057 89.21 2058 89.329 2059 89.449 2060 89.569 2061 89.69 2062 89.81 2063 89.932 2064 90.053 2065 90.175 2066 90.297 2067 90.419 2068 90.54 2069 90.661 2070 90.781 2071 90.901 2072 91.02 2073 91.139 2074 91.257 2075 91.375 2076 91.493 2077 91.612 2078 91.731 2079 91.851 2080 91.971 2081 92.09 2082 92.209 2083 92.327 2084 92.443 2085 92.56 2086 92.677 2087 92.794 2088 92.912 2089 93.031 2090 93.15 2091 93.27 2092 93.389 2093 93.508 2094 93.626 2095 93.744 2096 93.859 2097 93.974 2098 94.088 2099 94.2