Year	Percent
2000	14.09312
2001	14.54866
2002	14.91738
2003	15.40043
2004	15.73943
2005	15.82098
2006	16.09373
2007	15.4617
2008	15.48457
2009	14.38526
2010	13.45661
2011	12.40278
2012	11.02427
2013	10.2525
2014	9.90754
2015	9.78336
2016	9.84472