Year | Value | 2023 | 19,860 | 2022 | 18,982 | 2021 | 18,160 | 2020 | 17,383 | 2019 | 16,621 | 2018 | 15,882 | 2017 | 15,178 | 2016 | 14,512 | 2015 | 13,881 | 2014 | 13,282 | 2013 | 12,713 | 2012 | 12,184 | 2011 | 11,721 | 2010 | 11,377 | 2009 | 11,178 | 2008 | 11,075 | 2007 | 10,997 | 2006 | 10,882 | 2005 | 10,698 | 2004 | 10,422 | 2003 | 10,082 | 2002 | 9,698 | 2001 | 9,280 | 2000 | 8,887 | 1999 | 8,529 | 1998 | 8,177 | 1997 | 7,818 | 1996 | 7,510 | 1995 | 7,289 | 1994 | 7,174 | 1993 | 6,993 | 1992 | 7,093 | 1991 | 7,124 | 1990 | 6,520 | 1989 | 5,866 | 1988 | 5,408 | 1987 | 5,052 | 1986 | 4,723 | 1985 | 4,445 | 1984 | 4,226 | 1983 | 4,052 | 1982 | 3,899 | 1981 | 3,735 | 1980 | 3,536 | 1979 | 3,296 | 1978 | 3,023 | 1977 | 2,742 | 1976 | 2,478 | 1975 | 2,247 | 1974 | 2,057 |
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