Year	Number of
1990	3645
1991	3694
1992	3743
1993	3791
1994	3838
1995	3883
1996	3926
1997	3969
1998	4013
1999	4061
2000	4115
2001	4173
2002	4236
2003	4303
2004	4371
2005	4441
2006	4511
2007	4582