Year Number 1950 82.529 1951 83.681 1952 85.916 1953 87.729 1954 88.702 1955 89.087 1956 91.283 1957 92.108 1958 92.483 1959 93.238 1960 94.652 1961 96.249 1962 98.591 1963 101.176 1964 103.19 1965 104.262 1966 105.634 1967 106.074 1968 105.891 1969 105.584 1970 105.401 1971 105.643 1972 105.896 1973 106.114 1974 106.189 1975 106.086 1976 106.774 1977 107.226 1978 107.504 1979 107.706 1980 107.888 1981 107.418 1982 106.782 1983 105.994 1984 104.999 1985 103.76 1986 102.854 1987 101.579 1988 100.025 1989 98.274 1990 96.365 1991 95.748 1992 94.949 1993 93.909 1994 92.568 1995 90.925 1996 90.151 1997 89.066 1998 87.75 1999 86.327 2000 84.877 2001 84.231 2002 83.649 2003 83.124 2004 82.673 2005 82.326 2006 81.702 2007 81.272 2008 81.024 2009 80.935 2010 80.986 2011 80.741 2012 80.58 2013 80.5 2014 80.457 2015 80.391 2016 80.198 2017 79.81 2018 79.268 2019 78.613 2020 77.846 2021 76.735 2022 75.628 2023 74.44 2024 73.078 2025 71.53 2026 69.952 2027 68.249 2028 66.493 2029 64.795 2030 63.22 2031 61.868 2032 60.604 2033 59.443 2034 58.39 2035 57.444 2036 56.683 2037 56.01 2038 55.426 2039 54.934 2040 54.531 2041 54.256 2042 54.04 2043 53.88 2044 53.769 2045 53.7 2046 53.695 2047 53.71 2048 53.731 2049 53.746 2050 53.745 2051 53.731 2052 53.698 2053 53.64 2054 53.553 2055 53.437 2056 53.295 2057 53.122 2058 52.925 2059 52.712 2060 52.49 2061 52.251 2062 52.005 2063 51.761 2064 51.531 2065 51.324 2066 51.136 2067 50.965 2068 50.826 2069 50.736 2070 50.707 2071 50.734 2072 50.804 2073 50.926 2074 51.11 2075 51.358 2076 51.666 2077 52.027 2078 52.423 2079 52.825 2080 53.214 2081 53.585 2082 53.942 2083 54.283 2084 54.612 2085 54.929 2086 55.21 2087 55.474 2088 55.73 2089 55.985 2090 56.249 2091 56.48 2092 56.716 2093 56.964 2094 57.231 2095 57.523 2096 57.791 2097 58.08 2098 58.393 2099 58.732 2100 59.1