Year	Number of
1990	35780
1991	27650
1992	26870
1993	44040
1994	41490
1995	69440
1996	75610
1997	42820
1998	33900
1999	38680
2000	24010
2001	10480
2002	7695
2003	6717
2004	6897
2005	6642
2006	3114