Year	Percent
1999-01-01	48.146100000000000
2000-01-01	52.410500000000000
2001-01-01	46.344600000000000
2002-01-01	40.549200000000000
2003-01-01	45.971000000000004
2004-01-01	46.417800000000000
2005-01-01	52.809300000000000
2006-01-01	60.569700000000000
2007-01-01	66.496400000000000
2008-01-01	40.457500000000000
2009-01-01	47.600800000000000
2010-01-01	48.386400000000000
2011-01-01	37.401400000000000
2012-01-01	46.706800000000000
2013-01-01	54.571999999999996
2014-01-01	55.322400000000000
2015-01-01	62.170700000000000
2016-01-01	66.599800000000000