Year	Number of
1990	3924
1991	1764
1992	5752
1993	49860
1994	98240
1995	98700
1996	49840
1997	13960
1998	9684
1999	4143
2000	1860
2001	1265
2002	952
2003	347
2004	155
2005	47
2006	24