Year	Percent
2000	5.0694
2001	3.8613
2002	4.4237
2003	4.6316
2004	4.7732
2005	4.6132
2006	4.6314
2007	4.4001
2008	4.548
2009	4.8966
2010	5.7819
2011	5.1819
2012	4.8826
2013	5.095
2014	4.7209
2015	4.2734
2016	3.5458
2017	3.7876