Year	Number of
1990	86200
1991	86400
1992	95780
1993	64940
1994	61960
1995	56850
1996	40540
1997	42000
1998	50710
1999	37060
2000	36600
2001	34790
2002	37000
2003	48440
2004	50850
2005	46480
2006	35110