Year	Number of
1980	43060
1981	43510
1982	51210
1983	43180
1984	43880
1985	46940
1986	47560
1987	55500
1988	52460
1989	52270
1990	50200
1991	59780
1992	56590
1993	52990
1994	51760
1995	55740
1996	74710
1997	77840
1998	87470
1999	88880
2000	89790
2001	90730
2002	95040
2003	92740
2004	98170
2005	94920
2006	97360
2007	97400