Year	Percent
1999-01-01	5.7926199999999990
2000-01-01	4.4681500000000000
2001-01-01	4.7016599999999995
2002-01-01	5.4899900000000000
2003-01-01	6.5130000000000000
2004-01-01	5.8889900000000000
2005-01-01	8.9433899999999990
2006-01-01	10.2903000000000000
2007-01-01	18.6663000000000000
2008-01-01	9.3076900000000000
2009-01-01	16.2250000000000000
2010-01-01	19.0936000000000000
2011-01-01	12.9402000000000000
2012-01-01	12.7766000000000000
2013-01-01	11.1272000000000000
2014-01-01	9.4667700000000000
2015-01-01	6.7277500000000000
2016-01-01	9.5517899999999990