Year	Number of
1990	102100
1991	95920
1992	104000
1993	116600
1994	136400
1995	165900
1996	195800
1997	211800
1998	229700
1999	236200
2000	242000
2001	232500
2002	216200
2003	204300
2004	195300
2005	174500
2006	168100
2007	163900