Year	Percent
2000	6.2326
2001	6.6992
2002	6.2628
2003	6.4039
2004	6.9198
2005	6.2703
2006	6.1072
2007	5.7801
2008	5.5709
2009	6.5071
2010	6.6978
2011	5.969
2012	5.7215
2013	6.4665
2014	6.0977
2015	5.5115
2016	4.3791
2017	4.5075