Year	Percent
1993	1.3993
1994	3.02026
1995	5.07705
1996	15.89524
1997	5.74225
1998	4.06033
1999	3.04578
2000	4.10753
2001	1.81196
2002	27.21299
2005	4.75154
2006	5.36112
2007	10.96917
2008	12.79156
2009	20.42289
2010	36.10097
2011	37.08045
2016	31.80425
2017	34.50961