Year	Percent
1992	1.493
1994	20.33
1995	8.059
1996	5.731
1997	4.488
1998	5.378
1999	11.93
2000	19.9
2001	33.92
2002	46.78
2003	29.39
2004	19.39
2005	13.82
2006	24.04
2007	38.46