Year	Percent
1993	2.48488
1994	4.02168
1995	9.38673
1996	4.54171
1997	4.4023
1998	2.39092
1999	5.10061
2000	4.50999
2001	4.80932
2002	6.1856
2003	3.78081
2004	5.1723
2005	5.16019
2006	7.11158
2007	6.75923
2008	6.62636
2009	22.52356
2010	16.08411
2011	11.6
2012	8.9
2013	7.3
2014	8.8
2015	8.5
2016	6.20002
2017	5.46211