Year	Number of
1990	6822
1991	4693
1992	2872
1993	13280
1994	10290
1995	8750
1996	27040
1997	23120
1998	26440
1999	51440
2000	64620
2001	26510
2002	15650
2003	13460
2004	13400
2005	7755
2006	12100