Year	Percent
1999-01-01	6.2562700000000000
2000-01-01	5.3657400000000000
2001-01-01	5.2828900000000000
2002-01-01	5.1230199999999995
2003-01-01	6.1736200000000000
2004-01-01	7.5738000000000000
2005-01-01	8.5917900000000000
2006-01-01	11.2666000000000000
2007-01-01	12.7007000000000000
2008-01-01	7.8340600000000010
2009-01-01	11.3553000000000000
2010-01-01	11.9029999999999990
2011-01-01	10.8137000000000000
2012-01-01	11.0776000000000000
2013-01-01	23.2502000000000000
2014-01-01	24.5449000000000000
2015-01-01	29.1059999999999980
2016-01-01	28.2488000000000000