Year	Number of
1990	22040
1991	41050
1992	38500
1993	41790
1994	52600
1995	52020
1996	77890
1997	72190
1998	39030
1999	28050
2000	40010
2001	104000
2002	85190
2003	88660
2004	53810
2005	30360
2006	20470