Year	Number of
1990	8680
1991	12220
1992	18680
1993	47210
1994	84340
1995	82100
1996	60880
1997	35460
1998	36840
1999	20960
2000	11430
2001	10800
2002	10210
2003	9209
2004	5289
2005	2052
2006	767