Year	Percent
1998-01-01	23.7632000000000000
1999-01-01	11.2114000000000000
2000-01-01	21.0000000000000000
2001-01-01	16.7000000000000000
2002-01-01	11.8988000000000000
2003-01-01	10.5967000000000000
2004-01-01	14.9959999999999990
2005-01-01	19.2123000000000000
2006-01-01	16.3897000000000000
2007-01-01	16.7898000000000000
2008-01-01	17.2490000000000020
2009-01-01	12.9900000000000000
2010-01-01	14.9803000000000000
2011-01-01	11.0078000000000000
2012-01-01	7.3489800000000000
2013-01-01	7.1810199999999990
2014-01-01	5.1560000000000010
2015-01-01	6.4311300000000005
2016-01-01	4.6091600000000000