Year	Number of
1990	5909
1991	3573
1992	4072
1993	3974
1994	4241
1995	4711
1996	4724
1997	3195
1998	3462
1999	5307
2000	3708
2001	3823
2002	3661
2003	3698
2004	3037
2005	3414
2006	4074