Year	Percent
1999-01-01	6.945000000000000
2000-01-01	10.189000000000000
2001-01-01	7.784000000000000
2002-01-01	8.304000000000000
2003-01-01	10.424000000000001
2004-01-01	15.503000000000000
2005-01-01	18.747500000000000
2006-01-01	27.666800000000000
2007-01-01	27.046999999999997
2008-01-01	10.876900000000000
2009-01-01	15.071400000000000
2010-01-01	16.001600000000000
2011-01-01	10.997800000000000
2012-01-01	14.130999999999998
2013-01-01	15.247800000000000
2014-01-01	12.398000000000000
2015-01-01	14.317900000000000
2016-01-01	14.554000000000000