Year	Number of
1980	25240
1981	32460
1982	33000
1983	31810
1984	32430
1985	17680
1986	16750
1988	97500
1989	105500
1990	74470
1991	60810
1992	98460
1993	62970
1994	49650
1995	35530
1996	24650
1997	22180
1998	40500
1999	69060
2000	84590
2001	92790
2002	155200
2003	174200
2004	210200
2005	254600
2006	277600
2007	275200