Year	Percent
2002	3.131
2003	2.1219
2004	2.4251
2005	2.2927
2006	2.427
2007	2.5547
2008	1.9349
2009	1.8531
2010	3.2714
2011	2.3856
2012	1.4125
2013	1.6348
2014	1.0572
2015	1.3116
2016	1.6092
2017	1.3049