Year	Number of
1980	74270
1981	73370
1982	72240
1983	73280
1984	74600
1985	64640
1986	71760
1987	70130
1988	67550
1989	62990
1990	50640
1991	50410
1992	53150
1993	63590
1994	70820
1995	84980
1996	111100
1997	119100
1998	110900
1999	134400
2000	140700
2001	132500
2002	128900
2003	124000
2004	121400
2005	127900
2006	124700
2007	127300