Year	Number of
1990	85770
1991	81640
1992	77630
1993	73730
1994	69960
1995	66300
1996	65430
1997	61880
1998	57320
1999	56150
2000	53820
2001	51490
2002	49120
2003	48490
2004	45040
2005	42350
2006	39360
2007	37920