Year	Number
1992	4000
1993	4250
1994	4438.775510204081
1995	4555.255102040816
1996	4674.502617801047
1997	6054.971098265896
1998	6220.930232558139
1999	6491.228070175438
2000	6600.462427745664
2001	6252.369942196532
2002	6438.452380952382
2003	6167.630057803469
2004	5980.113636363637
2005	5895.227272727273