Year	Number of
1990	30500
1991	30880
1992	31240
1993	31600
1994	31960
1995	32320
1996	32690
1997	33080
1998	33460
1999	33850
2000	34220
2001	34570
2002	34900
2003	35230
2004	35560
2005	35910
2006	36260
2007	36620