Year	Percent
1993	1.61095
1994	1.84678
1995	4.29533
1996	2.14266
1997	2.08197
1998	5.56497
1999	9.73153
2000	8.08941
2001	8.35368
2002	10.37301
2003	2.02884
2004	5.39052
2005	10.07492
2006	4.58756
2007	7.3011
2008	3.7398
2009	2.5568
2010	4.90068
2011	1.83758
2012	4.54883
2013	3.51361
2014	3.89218
2015	0.90987
2016	5.55572
2017	4.26935