Year	Number of
1990	0
1992	0
1993	0
1994	145
1995	455
1996	769
1997	1171
1998	1356
1999	1513
2000	1389
2001	1631
2002	1670
2003	1541
2004	1808
2005	1868
2006	2129
2007	1856