Year	Number of
1990	104900
1991	86500
1992	86500
1993	66800
1994	65000
1995	99000
1996	71010
1997	38100
1998	20900
1999	18560
2000	81190
2001	1643000
2002	1588000
2003	1651000
2004	1868000
2005	1788000
2006	1677000