Year	Number of
1990	1080
1991	1243
1992	1362
1993	1491
1994	1632
1995	1811
1996	2019
1997	2322
1998	2677
1999	3063
2000	3463
2001	3830
2002	4146
2003	4341
2004	4383
2005	4319
2006	4190
2007	4096