Year	Number of
1990	42940
1991	45000
1992	45860
1993	47380
1994	49240
1995	51820
1996	54380
1997	58710
1998	48510
1999	53810
2000	60670
2001	66800
2002	73410
2003	81850
2004	84950
2005	89180
2006	92420
2007	95300