Year	Percent
1999	1.71257
2000	0.59436
2001	1.02978
2002	0.72581
2003	0.75258
2004	2.21884
2005	0.50789
2006	1.48014
2007	0.56112
2008	0.54586
2009	6.96634
2010	0.84933
2011	15.38055
2012	10.60254
2013	13.64037
2014	13.05482
2015	5.02826