Year	Percent
1998-01-01	10.2369000000000000
1999-01-01	10.2545000000000000
2000-01-01	11.6273000000000000
2001-01-01	10.9915000000000000
2002-01-01	9.7495700000000000
2003-01-01	8.0592600000000000
2004-01-01	7.1615899999999995
2005-01-01	6.9554100000000005
2006-01-01	6.6304300000000005
2007-01-01	5.7657500000000000
2008-01-01	4.6565199999999995
2009-01-01	4.7010000000000005
2010-01-01	10.1220000000000000
2011-01-01	10.0007000000000000
2012-01-01	9.2754400000000000
2013-01-01	8.0108199999999990
2014-01-01	9.0836399999999990
2015-01-01	13.4832000000000000
2016-01-01	12.3603000000000000