Year	Percent
1992	17.06
1994	16.4
1995	13.06
1996	12.37
1997	16.81
1998	38.4
1999	13.41
2000	9.816
2001	14.92
2002	5.323
2003	2.86
2004	6.09
2005	16.38
2006	14.3
2007	12.49