Year	Percent
1993	3.46
1994	3.84
2002	5.9762
2003	3.9331
2004	4.1491
2005	2.2818
2006	2.8795
2007	1.9839
2008	2.0547
2009	2.8115
2010	1.8483
2011	1.9609
2012	1.5339
2013	2.8136
2014	2.6106
2015	2.3452
2016	2.7814
2017	2.1758