Year	Percent
1995	0.92186
1996	1.81751
1997	3.50289
1998	8.23394
1999	4.43327
2000	3.29548
2001	3.61069
2002	4.62792
2003	1.15622
2004	3.51495
2005	3.23774
2006	6.84097
2007	5.77145
2008	3.98646
2009	0.04802
2010	2.33112
2011	3.53749
2012	1.34344
2013	1.52592
2014	1.0398
2015	2.33691
2016	2.24978
2017	2.25055