Year	Number of
1990	9635
1991	9814
1992	9985
1993	10150
1994	10310
1995	10480
1996	10640
1997	10800
1998	10950
1999	11090
2000	11210
2001	11320
2002	11430
2003	11530
2004	11620
2005	11720
2006	11820
2007	11900