Year	Percent
1993	5.92
1994	4.49
2002	5.344
2003	3.9092
2004	4.9386
2005	2.4182
2006	1.233
2007	2.077
2008	1.9167
2009	3.1426
2010	2.4838
2011	2.0639
2012	1.423
2013	2.4074
2014	1.5745
2015	2.5128
2016	2.3772
2017	2.7526