Year	Number of
1990	0
1991	0
1992	0
1993	0
1994	0
1995	3681
1996	4371
1997	4717
1998	4896
1999	5427
2000	5565
2001	4968
2002	4259
2003	3793
2004	3434
2005	3379
2006	3342
2007	3537