Year	Number of
1990	1776
1991	1557
1992	1742
1993	1843
1994	2255
1995	2500
1996	2774
1997	2989
1998	3279
1999	3413
2000	3301
2001	2930
2002	2646
2003	2636
2004	2664
2005	2669
2006	2654
2007	2639