Year	Number of
1990	44200
1991	45600
1992	47040
1993	48520
1994	50020
1995	51540
1996	48710
1997	51150
1998	52780
1999	55380
2000	58080
2001	61750
2002	65570
2003	66120
2004	69720
2005	76080
2006	76680
2007	82140