Year	Number of
1990	92870
1991	568900
1992	773500
1993	828400
1994	831500
1995	932800
1996	974200
1997	670900
1998	687300
1999	1937000
2000	3057000
2001	3366000
2002	2649000
2003	2260000
2004	1750000
2005	2362000
2006	2161000