Year | Value | 2023 | 26,528 | 2022 | 25,964 | 2021 | 25,433 | 2020 | 24,922 | 2019 | 24,342 | 2018 | 23,667 | 2017 | 22,915 | 2016 | 21,743 | 2015 | 20,142 | 2014 | 18,519 | 2013 | 17,041 | 2012 | 16,085 | 2011 | 15,609 | 2010 | 15,262 | 2009 | 15,002 | 2008 | 14,776 | 2007 | 14,540 | 2006 | 14,278 | 2005 | 13,991 | 2004 | 13,683 | 2003 | 13,461 | 2002 | 13,254 | 2001 | 12,907 | 2000 | 12,444 | 1999 | 11,897 | 1998 | 11,384 | 1997 | 10,941 | 1996 | 10,520 | 1995 | 10,126 | 1994 | 9,732 | 1993 | 9,312 | 1992 | 8,863 | 1991 | 8,347 | 1990 | 7,794 | 1989 | 7,215 | 1988 | 6,643 | 1987 | 6,221 | 1986 | 6,010 | 1985 | 5,983 | 1984 | 6,180 | 1983 | 6,580 | 1982 | 7,021 | 1981 | 7,435 | 1980 | 7,831 | 1979 | 8,161 | 1978 | 8,386 | 1977 | 8,513 | 1976 | 8,537 | 1975 | 8,451 |
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