Year	Number of
1990	4514
1991	4453
1992	4391
1993	4331
1994	4273
1995	4217
1996	4163
1997	4111
1998	4061
1999	4011
2000	3962
2001	3914
2002	3865
2003	3816
2004	3767
2005	3718
2006	3668
2007	3618