Year | Value | 2022 | 44,443 | 2021 | 45,321 | 2020 | 46,163 | 2019 | 47,146 | 2018 | 47,792 | 2017 | 48,267 | 2016 | 48,985 | 2015 | 49,542 | 2014 | 49,887 | 2013 | 50,103 | 2012 | 50,212 | 2011 | 50,122 | 2010 | 49,864 | 2009 | 49,546 | 2008 | 49,172 | 2007 | 48,743 | 2006 | 48,406 | 2005 | 48,235 | 2004 | 48,162 | 2003 | 48,064 | 2002 | 47,960 | 2001 | 47,988 | 2000 | 48,245 | 1999 | 48,889 | 1998 | 50,022 | 1997 | 51,640 | 1996 | 53,592 | 1995 | 55,747 | 1994 | 58,145 | 1993 | 60,872 | 1992 | 63,928 | 1991 | 67,279 | 1990 | 70,748 | 1989 | 73,794 | 1988 | 76,221 | 1987 | 78,037 | 1986 | 79,031 | 1985 | 79,117 | 1984 | 78,678 | 1983 | 77,714 | 1982 | 75,950 | 1981 | 73,731 | 1980 | 71,457 | 1979 | 69,413 | 1978 | 67,868 | 1977 | 66,912 | 1976 | 66,128 | 1975 | 65,165 | 1974 | 64,038 | 1973 | 62,921 | 1972 | 62,216 | 1971 | 62,519 | 1970 | 64,078 | 1969 | 66,262 | 1968 | 68,379 | 1967 | 70,201 | 1966 | 71,551 | 1965 | 72,275 | 1964 | 72,379 | 1963 | 71,913 | 1962 | 70,959 | 1961 | 69,619 | 1960 | 68,507 |
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