Year	Percent
2002	4.2032
2003	2.5544
2004	2.1186
2005	2.2672
2006	2.116
2007	1.5829
2008	1.7676
2009	2.6084
2010	1.1708
2011	2.1032
2012	1.2052
2013	2.0233
2014	1.3757
2015	1.4018
2016	2.2458
2017	2.7311