Year	Percent
1993	44.57537
1994	35.20191
1996	27.25824
1997	25.36492
1998	39.77
1999	39.85283
2000	8.35473
2001	4.49502
2002	7.9598
2003	4.01767
2004	13.81719
2005	10.90254
2006	32.0556
2007	18.21266
2008	17.40172
2009	2.99772