Year	Number of
1990	1587
1991	1512
1992	2304
1993	5240
1994	5781
1995	3194
1996	10320
1997	8164
1998	8933
1999	9908
2000	3194
2001	3559
2002	3895
2003	3577
2004	3381
2005	3096
2006	2886
2007	2726