Year Number 1950 92.737 1951 93.277 1952 93.741 1953 94.215 1954 94.829 1955 95.651 1956 97.339 1957 98.907 1958 100.428 1959 101.874 1960 103.158 1961 104.45 1962 105.501 1963 106.262 1964 106.631 1965 106.551 1966 106.251 1967 105.535 1968 104.486 1969 103.199 1970 101.724 1971 100.203 1972 98.537 1973 96.773 1974 94.946 1975 93.079 1976 91.297 1977 89.484 1978 87.698 1979 86.008 1980 84.445 1981 83.004 1982 81.74 1983 80.61 1984 79.544 1985 78.502 1986 77.605 1987 76.681 1988 75.778 1989 74.97 1990 74.276 1991 73.531 1992 72.936 1993 72.414 1994 71.851 1995 71.189 1996 70.495 1997 69.663 1998 68.763 1999 67.914 2000 67.171 2001 66.309 2002 65.635 2003 65.054 2004 64.429 2005 63.708 2006 63.017 2007 62.212 2008 61.375 2009 60.626 2010 60.016 2011 59.391 2012 58.905 2013 58.513 2014 58.143 2015 57.757 2016 57.341 2017 56.926 2018 56.518 2019 56.147 2020 55.825 2021 55.471 2022 55.174 2023 54.92 2024 54.695 2025 54.491 2026 54.262 2027 54.061 2028 53.889 2029 53.747 2030 53.639 2031 53.496 2032 53.389 2033 53.313 2034 53.263 2035 53.24 2036 53.184 2037 53.157 2038 53.158 2039 53.187 2040 53.241 2041 53.245 2042 53.279 2043 53.348 2044 53.459 2045 53.614 2046 53.739 2047 53.913 2048 54.13 2049 54.382 2050 54.664 2051 54.889 2052 55.15 2053 55.448 2054 55.788 2055 56.173 2056 56.511 2057 56.902 2058 57.33 2059 57.774 2060 58.222 2061 58.573 2062 58.936 2063 59.325 2064 59.759 2065 60.253 2066 60.691 2067 61.194 2068 61.753 2069 62.356 2070 62.994 2071 63.536 2072 64.122 2073 64.752 2074 65.422 2075 66.127 2076 66.721 2077 67.361 2078 68.038 2079 68.737 2080 69.452 2081 70.022 2082 70.62 2083 71.247 2084 71.9 2085 72.571 2086 73.078 2087 73.625 2088 74.202 2089 74.8 2090 75.419 2091 75.868 2092 76.351 2093 76.874 2094 77.433 2095 78.022 2096 78.401 2097 78.837 2098 79.319 2099 79.826 2100 80.344