Year | Value | 2023 | 13,925 | 2022 | 13,804 | 2021 | 13,778 | 2020 | 13,786 | 2019 | 13,862 | 2018 | 13,977 | 2017 | 14,095 | 2016 | 14,138 | 2015 | 14,114 | 2014 | 14,145 | 2013 | 14,269 | 2012 | 14,447 | 2011 | 14,679 | 2010 | 14,847 | 2009 | 14,727 | 2008 | 14,369 | 2007 | 14,031 | 2006 | 13,801 | 2005 | 13,655 | 2004 | 13,637 | 2003 | 13,746 | 2002 | 13,852 | 2001 | 13,810 | 2000 | 13,627 | 1999 | 13,317 | 1998 | 12,823 | 1997 | 12,224 | 1996 | 11,672 | 1995 | 11,135 | 1994 | 10,611 | 1993 | 10,145 | 1992 | 9,655 | 1991 | 9,070 | 1990 | 8,470 | 1989 | 7,969 | 1988 | 7,571 | 1987 | 7,281 | 1986 | 7,107 | 1985 | 6,985 | 1984 | 6,949 | 1983 | 7,034 | 1982 | 7,194 | 1981 | 7,392 | 1980 | 7,484 | 1979 | 7,413 | 1978 | 7,263 | 1977 | 7,041 | 1976 | 6,758 | 1975 | 6,447 | 1974 | 6,154 |
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