Year	Number of
1990	171900
1991	132400
1992	103300
1993	136400
1994	145900
1995	123200
1996	179900
1997	161300
1998	160300
2000	101200
2001	1401000
2002	1494000
2003	1482000
2004	1495000
2005	1793000
2006	1327000