Year	Percent
1995	0.26857
1996	0
1997	3.06444
1998	0.61802
1999	0.60839
2000	0.79173
2001	1.44647
2002	3.04424
2003	6.92344
2004	3.85524
2005	6.0073
2006	13.9039
2007	10.98033
2008	8.23322
2009	6.87261
2010	4.29122
2011	10.60952
2012	3.13213
2013	4.52486
2014	4.5227
2015	6.3109
2016	6.14816
2017	6.94835