Year	Number of
1990	117400
1991	101600
1992	74000
1993	59000
1994	62000
1995	47120
1996	33380
1997	26800
1998	27090
1999	26800
2000	18620
2001	26940
2002	172200
2003	169800
2004	145700
2005	100100
2006	116300