Year	Percent
1995	1.85039
1996	5.23069
1997	3.98492
1998	1.88661
1999	4.64811
2000	12.2724
2001	8.33855
2002	4.12256
2003	6.96934
2004	14.0409
2005	26.15232
2006	86.93786
2007	93.84093
2008	115.27483
2009	80.30962
2010	116.52231
2011	149.16485
2012	158.31532
2013	131.1009
2014	97.32733
2015	84.99342
2016	67.13343