Year	Number
1992	61400
1993	57600
1994	55600
1995	50500
1996	63000
1997	56938
1998	53366
1999	54919
2000	55815
2001	55644
2002	56498
2003	55294
2004	55697
2005	56100
2006	57830
2007	59562