Year	Number of
1990	77470
1991	96340
1992	76970
1993	64580
1994	51090
1995	67530
1996	56360
1997	38680
1998	32950
1999	23110
2000	19720
2001	19300
2002	15560
2003	23560
2004	13820
2005	18970
2006	15910