Year	Percent
1994	4.37525
1995	6.33165
1996	6.81739
1997	6.73682
1998	11.94033
1999	14.26154
2000	10.08491
2001	14.3121
2002	10.80323
2003	13.73028
2004	9.36146
2005	14.1932
2006	13.20149
2007	8.68814
2008	13.85034
2009	24.21505
2010	11.61059
2011	7.24534
2012	7.85317
2013	7.991
2014	14.478
2015	23.35638
2016	19.16108