Year	Percent
1996	5.02
1997	4.26
1998	5.39
2000	2.8043
2001	1.5545
2003	4.2609
2004	3.0548
2005	0.8928
2006	1.5823
2007	1.2617
2008	1.7671
2009	1.7805
2010	1.9386
2011	0.9933
2012	1.4374
2013	1.5958
2014	1.6617
2015	1.603
2016	2.2841
2017	1.5516