Year	Percent
2000	6.6562
2001	4.7815
2002	3.6167
2003	4.2233
2004	5.0422
2005	5.5862
2006	4.9263
2007	4.1363
2008	3.5952
2009	4.5369
2010	5.3048
2011	6.4326
2012	9.7505
2013	13.3655
2014	12.8646
2015	13.1973
2016	11.9935
2017	10.8786