Year	Percent
1994	3.964
1995	4.8968
1996	5.2057
1997	5.271
1998	5.5933
1999	4.7556
2000	4.595
2001	4.1264
2002	4.53
2003	4.3402
2004	5.8924
2005	5.8571
2006	5.6014
2007	5.2993
2008	4.4098
2009	5.0863
2010	4.63
2011	4.5839
2012	4.7865
2013	5.2944
2014	5.383
2015	5.3101
2016	5.5443
2017	5.033