Year	Number of
1990	201
1991	343
1992	546
1993	850
1994	1286
1995	1859
1996	2564
1997	3373
1998	4243
1999	5506
2000	6612
2001	7762
2002	8592
2003	9452
2004	10040
2005	10280
2006	10630
2007	10980