Year	Number of
1990	669
1991	1014
1992	1612
1993	2094
1994	2350
1995	2537
1996	2666
1997	2824
1998	2985
1999	3160
2000	3357
2001	3537
2002	3676
2003	3723
2004	3647
2005	3493
2006	3286
2007	3094