Year	Number of
1990	243700
1991	1144000
1992	783000
1993	723000
1994	667400
1995	156600
1997	893200
1998	1169000
1999	1472000
2000	1636000
2001	1250000
2002	1863000
2003	3246000
2004	2489000
2005	2329000
2006	2283000