Year	Percent
1992	1.11
1996	0.57
2001	3.701
2002	5.528
2003	4.314
2004	3.248
2005	2.029
2007	2.359
2008	2.777
2009	2.803
2010	3.4525
2011	2.9671
2012	2.1555
2013	1.7114
2014	2.7002
2015	1.5362
2016	2.0042
2017	1.9455