Year	Number of
1990	165000
1991	163100
1992	161100
1993	159200
1994	157300
1995	155600
1996	130400
1997	136700
1998	139800
1999	135200
2000	122400
2001	110500
2002	94620
2003	82350
2004	79920
2005	77060
2006	77940
2007	78850