Year	Number of
1990	27800
1991	27940
1992	27820
1993	27600
1994	27530
1995	27750
1996	28650
1997	31890
1998	32050
1999	33800
2000	35470
2001	37290
2002	40290
2003	40940
2004	42630
2005	44510
2006	46520
2007	49360