Year	Number of
1990	10180
1991	9964
1992	9716
1993	9541
1994	9571
1995	9884
1996	9528
1997	10490
1998	10690
1999	11720
2000	13360
2001	13910
2002	12400
2003	14110
2004	12380
2005	14320
2006	14060
2007	14920