Year | Value | 2021 | 28,019 | 2020 | 20,703 | 2019 | 41,933 | 2018 | 36,660 | 2009 | 50,716 | 2008 | 51,921 | 2007 | 50,440 | 2006 | 47,585 | 2005 | 43,282 | 2004 | 40,076 | 2003 | 35,680 | 2002 | 34,496 | 2001 | 35,054 | 2000 | 35,054 | 1999 | 33,500 | 1998 | 24,500 | 1997 | 24,600 | 1996 | 23,000 | 1995 | 22,300 | 1994 | 22,300 | 1993 | 22,300 | 1992 | 22,300 | 1991 | 22,300 | 1990 | 22,300 | 1989 | 22,300 | 1988 | 22,000 | 1987 | 22,000 | 1986 | 9,000 | 1985 | 9,500 |
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