Year	Number
1993	30851
1994	32810
1995	27746
1996	26650
1997	25726
1998	25067
1999	23913
2000	23479
2001	23102
2002	22046
2003	22615
2004	22053
2005	21837
2006	22748
2007	21182
2008	21372