Year	Number of
1990	9439
1991	9748
1992	10060
1993	10390
1994	10720
1995	11060
1996	11410
1997	11770
1998	12160
1999	12570
2000	13020
2001	13500
2002	14010
2003	14560
2004	15140
2005	15740
2006	16370
2007	17020