Year	Percent
1995	4.13
2001	3.7667
2002	2.9282
2003	2.0483
2004	2.9132
2005	3.3737
2006	3.5881
2007	3.0367
2008	2.5392
2009	2.6842
2010	2.6419
2011	3.204
2012	3.2446
2013	3.3924
2014	3.3597
2015	3.2477
2016	2.9195
2017	3.1558