Year	Percent
1999-01-01	4.0965400000000000
2000-01-01	2.1303000000000000
2001-01-01	2.6871000000000000
2002-01-01	5.0694900000000000
2003-01-01	39.7220000000000000
2004-01-01	49.5950000000000000
2005-01-01	31.6097000000000000
2006-01-01	53.2244000000000000
2007-01-01	57.2943000000000000
2008-01-01	24.8719000000000000
2009-01-01	1.2823500000000000
2010-01-01	1.5629600000000001
2011-01-01	1.2789900000000000
2012-01-01	2.5831800000000000
2013-01-01	3.5021400000000003
2014-01-01	3.9768300000000000
2015-01-01	5.3160000000000000
2016-01-01	6.4595000000000000