Year	Number of
1990	7678
1991	8239
1992	8909
1993	9880
1994	10720
1995	11350
1996	11750
1997	12160
1998	12470
1999	13050
2000	13520
2001	14110
2002	14250
2003	14250
2004	13650
2005	12980
2006	12000
2007	11030