Year	Number of
1990	4018
1991	4067
1992	4114
1993	4156
1994	4194
1995	4228
1996	3500
1997	4643
1998	4719
1999	4789
2000	4819
2001	4840
2002	4911
2003	4849
2004	4901
2005	4773
2006	4438
2007	4495