Year	Percent
1990	0.62
1995	7.03
1997	6.58
1998	6.94
2000	8.31
2002	8.75
2004	8.75
2006	0.25
2007	0.04
2008	0.08
2009	0.26
2010	0.21
2011	0.16
2013	1.71
2014	0.4
2015	2.43
2018	5.26