Year	Percent
2002-01-01	7.9532300000000005
2003-01-01	9.2227300000000000
2004-01-01	14.6162000000000000
2005-01-01	15.6474000000000000
2006-01-01	25.3934000000000000
2007-01-01	53.2797000000000000
2008-01-01	78.4073000000000000
2009-01-01	83.2150000000000000
2010-01-01	69.5347000000000000
2011-01-01	60.1143000000000000
2012-01-01	56.3456000000000000
2013-01-01	52.7173000000000000
2014-01-01	51.2627000000000000
2015-01-01	49.4902000000000000
2016-01-01	47.0199000000000000