Year Number 1950 50.868 1951 50.921 1952 51.118 1953 51.532 1954 52.075 1955 52.624 1956 53.158 1957 53.773 1958 54.345 1959 54.797 1960 55.132 1961 55.722 1962 56.076 1963 56.343 1964 56.715 1965 57.263 1966 57.863 1967 58.591 1968 59.361 1969 60.038 1970 60.553 1971 60.704 1972 60.778 1973 60.751 1974 60.617 1975 60.384 1976 60.356 1977 60.16 1978 59.806 1979 59.295 1980 58.624 1981 57.975 1982 57.121 1983 56.157 1984 55.2 1985 54.311 1986 53.3 1987 52.462 1988 51.702 1989 50.905 1990 50.046 1991 49.287 1992 48.469 1993 47.675 1994 47.018 1995 46.552 1996 46.216 1997 45.996 1998 45.877 1999 45.815 2000 45.791 2001 45.434 2002 45.154 2003 44.96 2004 44.847 2005 44.816 2006 45.065 2007 45.352 2008 45.696 2009 46.103 2010 46.547 2011 47.426 2012 48.287 2013 49.129 2014 49.956 2015 50.764 2016 51.102 2017 51.519 2018 51.972 2019 52.406 2020 52.813 2021 53.29 2022 53.715 2023 54.163 2024 54.744 2025 55.506 2026 56.296 2027 57.311 2028 58.5 2029 59.771 2030 61.087 2031 62.336 2032 63.634 2033 65.029 2034 66.584 2035 68.33 2036 70.061 2037 71.96 2038 74.021 2039 76.219 2040 78.524 2041 80.698 2042 82.988 2043 85.295 2044 87.473 2045 89.422 2046 90.832 2047 91.968 2048 92.869 2049 93.589 2050 94.15 2051 94.174 2052 94.06 2053 93.834 2054 93.531 2055 93.18 2056 92.462 2057 91.785 2058 91.133 2059 90.476 2060 89.812 2061 88.835 2062 87.907 2063 87.086 2064 86.434 2065 85.975 2066 85.377 2067 85.006 2068 84.866 2069 84.929 2070 85.17 2071 85.328 2072 85.739 2073 86.298 2074 86.884 2075 87.45 2076 87.754 2077 88.015 2078 88.284 2079 88.632 2080 89.077 2081 89.246 2082 89.483 2083 89.784 2084 90.123 2085 90.469 2086 90.47 2087 90.509 2088 90.572 2089 90.656 2090 90.779 2091 90.573 2092 90.413 2093 90.33 2094 90.34 2095 90.435 2096 90.191 2097 90.072 2098 90.072 2099 90.166 2100 90.344