Year Number 1950 84.916 1951 86.253 1952 88.179 1953 89.873 1954 91.074 1955 91.881 1956 93.745 1957 94.785 1958 95.482 1959 96.249 1960 97.214 1961 98.21 1962 99.437 1963 100.663 1964 101.527 1965 101.877 1966 102.217 1967 102.115 1968 101.717 1969 101.298 1970 101.011 1971 100.975 1972 101.122 1973 101.302 1974 101.25 1975 100.819 1976 100.784 1977 100.057 1978 98.909 1979 97.678 1980 96.48 1981 94.598 1982 93.032 1983 91.535 1984 89.792 1985 87.718 1986 85.395 1987 82.933 1988 80.452 1989 78.155 1990 76.142 1991 74.422 1992 72.834 1993 71.399 1994 70.113 1995 68.964 1996 68.028 1997 67.202 1998 66.426 1999 65.628 2000 64.777 2001 63.938 2002 63.093 2003 62.252 2004 61.447 2005 60.687 2006 59.684 2007 58.727 2008 57.789 2009 56.843 2010 55.887 2011 54.956 2012 54.04 2013 53.168 2014 52.376 2015 51.682 2016 51.139 2017 50.652 2018 50.227 2019 49.864 2020 49.558 2021 49.262 2022 49.035 2023 48.858 2024 48.703 2025 48.555 2026 48.404 2027 48.264 2028 48.149 2029 48.087 2030 48.093 2031 48.122 2032 48.213 2033 48.366 2034 48.578 2035 48.845 2036 49.113 2037 49.439 2038 49.812 2039 50.221 2040 50.662 2041 51.065 2042 51.497 2043 51.964 2044 52.468 2045 53.004 2046 53.472 2047 53.978 2048 54.521 2049 55.103 2050 55.73 2051 56.29 2052 56.896 2053 57.554 2054 58.27 2055 59.044 2056 59.729 2057 60.474 2058 61.279 2059 62.144 2060 63.063 2061 63.859 2062 64.716 2063 65.622 2064 66.56 2065 67.515 2066 68.29 2067 69.096 2068 69.928 2069 70.78 2070 71.651 2071 72.325 2072 73.025 2073 73.762 2074 74.55 2075 75.399 2076 76.047 2077 76.764 2078 77.546 2079 78.378 2080 79.251 2081 79.868 2082 80.537 2083 81.256 2084 82.019 2085 82.818 2086 83.339 2087 83.912 2088 84.532 2089 85.189 2090 85.875 2091 86.263 2092 86.701 2093 87.185 2094 87.706 2095 88.264 2096 88.517 2097 88.82 2098 89.174 2099 89.581 2100 90.043