Year	Number of
1990	186000
1991	180500
1992	175400
1993	170600
1994	166100
1995	161700
1996	158400
1997	155300
1998	148800
1999	147700
2000	144300
2001	140500
2002	137400
2003	131300
2004	116600
2005	111800
2006	105200
2007	114400