Year	Number of
1990	81840
1991	64120
1992	56070
1993	158700
1995	197400
1996	6457
1997	10630
1998	2113
1999	197500
2000	246300
2001	246300
2002	202400
2003	195000
2004	162300
2005	185500
2006	148700