Year	Number of
1990	10120
1991	11610
1992	12740
1993	13560
1994	14090
1995	14400
1996	14580
1997	14680
1998	14680
1999	14610
2000	14500
2001	14350
2002	14160
2003	13950
2004	13720
2005	13490
2006	13220
2007	13020