Year Number 1950 95.176 1951 95.633 1952 94.982 1953 94.155 1954 93.427 1955 92.677 1956 92.365 1957 92.282 1958 92.051 1959 91.374 1960 90.211 1961 90.629 1962 90.241 1963 89.458 1964 88.812 1965 88.525 1966 89.474 1967 90.513 1968 91.547 1969 92.351 1970 92.812 1971 94.087 1972 94.903 1973 95.388 1974 95.705 1975 95.93 1976 96.933 1977 97.666 1978 98.178 1979 98.473 1980 98.546 1981 99.479 1982 99.946 1983 100.095 1984 100.164 1985 100.325 1986 99.562 1987 98.703 1988 97.66 1989 96.166 1990 94.027 1991 95.366 1992 96.123 1993 96.489 1994 96.878 1995 97.61 1996 98.171 1997 98.718 1998 99.236 1999 99.521 2000 99.44 2001 99.748 2002 99.659 2003 99.322 2004 98.957 2005 98.687 2006 98.395 2007 98.21 2008 98.087 2009 97.905 2010 97.6 2011 97.248 2012 96.655 2013 95.936 2014 95.221 2015 94.546 2016 93.653 2017 92.862 2018 92.088 2019 91.195 2020 90.133 2021 89.082 2022 87.857 2023 86.54 2024 85.238 2025 83.998 2026 82.765 2027 81.572 2028 80.41 2029 79.253 2030 78.09 2031 76.99 2032 75.886 2033 74.796 2034 73.741 2035 72.733 2036 71.818 2037 70.933 2038 70.085 2039 69.283 2040 68.528 2041 67.863 2042 67.236 2043 66.643 2044 66.074 2045 65.525 2046 65.033 2047 64.546 2048 64.08 2049 63.651 2050 63.267 2051 62.926 2052 62.617 2053 62.329 2054 62.049 2055 61.768 2056 61.488 2057 61.2 2058 60.912 2059 60.632 2060 60.365 2061 60.09 2062 59.822 2063 59.564 2064 59.314 2065 59.073 2066 58.822 2067 58.573 2068 58.338 2069 58.135 2070 57.973 2071 57.819 2072 57.696 2073 57.602 2074 57.524 2075 57.458 2076 57.378 2077 57.304 2078 57.241 2079 57.202 2080 57.19 2081 57.163 2082 57.158 2083 57.172 2084 57.203 2085 57.249 2086 57.266 2087 57.294 2088 57.334 2089 57.391 2090 57.466 2091 57.501 2092 57.55 2093 57.613 2094 57.692 2095 57.787 2096 57.835 2097 57.897 2098 57.976 2099 58.074 2100 58.192