Year	Percent
2000	5.96435
2001	7.73606
2002	6.97897
2003	5.26369
2004	4.0693
2005	3.51732
2006	2.87924
2007	2.34673
2008	1.86046
2009	2.1636
2010	3.70549
2011	4.52403
2012	4.96735
2013	5.24639
2014	4.85363
2015	3.83496
2016	2.99665
2017	2.36545