Year	Number of
1990	29970
1991	30810
1992	31640
1993	32440
1994	33240
1995	34020
1996	34620
1997	37030
1998	38960
1999	42630
2000	43400
2001	45650
2002	48300
2003	49270
2004	52120
2005	53670
2006	55660
2007	57940