Year	Number of
1990	54650
1991	62070
1992	67890
1993	74440
1994	81160
1995	88690
1996	95790
1997	105300
1998	116200
1999	129000
2000	144100
2001	159700
2002	174800
2003	186900
2004	193400
2005	195800
2006	195400
2007	194700