Year	Percent
1983	0.9654
1988	1.1647
1989	1.8652
1995	2.0145
2006	0.8939
2007	1.4088
2008	3.0861
2009	3.6846
2010	2.2783
2011	0.9115
2012	0.9567
2013	2.8305
2014	4.1256
2015	2.6777
2016	1.8292
2017	3.7215