Year | Value | 2021 | 47,806 | 2020 | 47,801 | 2019 | 47,797 | 2018 | 47,795 | 2017 | 47,775 | 2016 | 47,730 | 2015 | 47,698 | 2014 | 47,697 | 2013 | 47,698 | 2012 | 47,683 | 2011 | 47,687 | 2010 | 47,668 | 2009 | 47,573 | 2008 | 47,567 | 2007 | 47,565 | 2006 | 47,560 | 2005 | 47,586 | 2004 | 47,549 | 2003 | 47,546 | 2002 | 47,449 | 2001 | 47,456 | 2000 | 47,404 | 1999 | 46,924 | 1998 | 46,821 | 1997 | 45,887 | 1996 | 45,262 | 1995 | 44,891 | 1994 | 44,860 | 1993 | 44,566 | 1992 | 44,462 | 1991 | 44,462 | 1990 | 44,462 | 1989 | 44,462 | 1988 | 44,462 | 1987 | 44,462 | 1986 | 44,462 | 1985 | 44,462 | 1984 | 44,462 | 1983 | 44,462 | 1982 | 44,462 | 1981 | 44,462 | 1980 | 44,462 | 1979 | 44,462 | 1978 | 44,462 | 1977 | 44,462 | 1976 | 44,462 | 1975 | 44,462 | 1974 | 44,462 |
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