Year	Percent
1993	0.11081
1994	0.49807
1995	0.44506
1996	0.05539
1998	0.9864
1999	0.75946
2000	0.98145
2001	0.58399
2002	4.43364
2003	8.36461
2004	10.80188
2005	17.15992
2006	30.25178
2007	48.78843
2008	16.32156
2009	16.67776
2010	14.57489
2011	14.37387