Year	Number of
1990	54770
1991	60030
1992	65320
1993	71020
1994	78180
1995	84570
1996	92530
1997	102100
1998	107300
1999	114500
2000	123100
2001	127200
2002	136500
2003	138900
2004	139800
2005	140200
2006	139200
2007	136300