Year Number 1950 78.965 1951 80.057 1952 81.494 1953 82.54 1954 83.007 1955 83.064 1956 84.727 1957 85.455 1958 85.792 1959 86.215 1960 86.876 1961 88.041 1962 89.476 1963 90.909 1964 91.899 1965 92.273 1966 93.716 1967 94.361 1968 94.407 1969 94.107 1970 93.525 1971 94.431 1972 94.902 1973 94.966 1974 94.737 1975 94.36 1976 93.68 1977 92.916 1978 92.169 1979 91.486 1980 90.934 1981 92.089 1982 92.981 1983 93.825 1984 94.828 1985 96.045 1986 97.944 1987 99.782 1988 101.433 1989 102.645 1990 103.261 1991 105.788 1992 107.554 1993 108.591 1994 109.014 1995 108.897 1996 109.274 1997 109.242 1998 108.824 1999 108.072 2000 107.074 2001 103.914 2002 100.747 2003 97.728 2004 95.016 2005 92.703 2006 91.087 2007 89.743 2008 88.664 2009 87.812 2010 87.162 2011 87.683 2012 88.125 2013 88.565 2014 89.075 2015 89.655 2016 90.54 2017 91.388 2018 92.098 2019 92.518 2020 92.566 2021 92.674 2022 92.349 2023 91.668 2024 90.748 2025 89.656 2026 88.532 2027 87.287 2028 85.93 2029 84.472 2030 82.948 2031 81.645 2032 80.296 2033 78.948 2034 77.656 2035 76.458 2036 75.579 2037 74.739 2038 73.966 2039 73.279 2040 72.682 2041 72.346 2042 72.028 2043 71.733 2044 71.451 2045 71.17 2046 71.007 2047 70.799 2048 70.544 2049 70.239 2050 69.883 2051 69.544 2052 69.143 2053 68.677 2054 68.142 2055 67.545 2056 66.961 2057 66.325 2058 65.649 2059 64.946 2060 64.231 2061 63.579 2062 62.916 2063 62.262 2064 61.637 2065 61.053 2066 60.574 2067 60.117 2068 59.697 2069 59.326 2070 59.011 2071 58.8 2072 58.615 2073 58.455 2074 58.314 2075 58.19 2076 58.112 2077 58.032 2078 57.949 2079 57.861 2080 57.767 2081 57.692 2082 57.602 2083 57.496 2084 57.37 2085 57.227 2086 57.086 2087 56.929 2088 56.76 2089 56.585 2090 56.409 2091 56.254 2092 56.089 2093 55.926 2094 55.783 2095 55.671 2096 55.582 2097 55.515 2098 55.476 2099 55.465 2100 55.48