Year	Number of
1990	24800
1991	25710
1992	26640
1993	27590
1994	28550
1995	29510
1996	30960
1997	29110
1998	29070
1999	30190
2000	30920
2001	32330
2002	34360
2003	33990
2004	36770
2005	37860
2006	39760
2007	41540