Year Number 1950 84.517 1951 85.818 1952 88.218 1953 90.08 1954 91.165 1955 91.865 1956 94.555 1957 95.909 1958 96.822 1959 97.988 1960 99.551 1961 101.242 1962 103.241 1963 105.186 1964 106.469 1965 106.818 1966 106.732 1967 106.087 1968 104.987 1969 103.657 1970 102.269 1971 101.538 1972 100.665 1973 99.782 1974 99.017 1975 98.413 1976 98.472 1977 98.515 1978 98.577 1979 98.654 1980 98.711 1981 99.028 1982 99.367 1983 99.639 1984 99.706 1985 99.491 1986 99.226 1987 98.645 1988 97.831 1989 96.893 1990 95.872 1991 94.373 1992 92.822 1993 91.19 1994 89.42 1995 87.49 1996 85.422 1997 83.295 1998 81.137 1999 78.994 2000 76.891 2001 74.78 2002 72.734 2003 70.783 2004 68.971 2005 67.319 2006 65.575 2007 64.052 2008 62.682 2009 61.367 2010 60.06 2011 58.738 2012 57.389 2013 56.102 2014 55 2015 54.13 2016 53.266 2017 52.62 2018 52.125 2019 51.683 2020 51.243 2021 50.769 2022 50.3 2023 49.84 2024 49.409 2025 49.015 2026 48.571 2027 48.161 2028 47.788 2029 47.451 2030 47.155 2031 46.85 2032 46.585 2033 46.375 2034 46.234 2035 46.171 2036 46.131 2037 46.172 2038 46.289 2039 46.479 2040 46.745 2041 47.015 2042 47.353 2043 47.774 2044 48.29 2045 48.899 2046 49.501 2047 50.196 2048 50.97 2049 51.804 2050 52.689 2051 53.522 2052 54.409 2053 55.344 2054 56.317 2055 57.325 2056 58.225 2057 59.151 2058 60.107 2059 61.096 2060 62.118 2061 62.988 2062 63.889 2063 64.821 2064 65.774 2065 66.745 2066 67.516 2067 68.305 2068 69.126 2069 70.001 2070 70.946 2071 71.712 2072 72.554 2073 73.466 2074 74.422 2075 75.403 2076 76.147 2077 76.931 2078 77.751 2079 78.607 2080 79.499 2081 80.148 2082 80.846 2083 81.586 2084 82.359 2085 83.154 2086 83.669 2087 84.22 2088 84.809 2089 85.431 2090 86.085 2091 86.443 2092 86.847 2093 87.295 2094 87.786 2095 88.318 2096 88.545 2097 88.827 2098 89.167 2099 89.563 2100 90.01