Year	Percent
1999-01-01	7.541760000000001
2000-01-01	9.235790000000000
2001-01-01	12.909700000000000
2002-01-01	12.250200000000000
2003-01-01	13.256700000000000
2004-01-01	11.984100000000000
2005-01-01	9.429739999999999
2006-01-01	9.345440000000000
2007-01-01	8.092180000000000
2008-01-01	6.179270000000000
2009-01-01	8.536300000000000
2010-01-01	7.703550000000000
2011-01-01	8.392780000000000
2012-01-01	8.943800000000000
2013-01-01	10.911100000000000
2014-01-01	14.265500000000000
2015-01-01	19.365200000000000
2016-01-01	24.128500000000000