Year	Number of
1990	248900
1991	282300
1992	280600
1993	295700
1994	263100
1995	95360
1996	29820
1997	384900
1998	12230
1999	530200
2000	546600
2001	612900
2002	723100
2003	809400
2004	1969000
2005	962700
2006	1023000