Year	Percent
1997-01-01	0.7861739999999999
1998-01-01	2.7270800000000000
1999-01-01	3.5993300000000000
2000-01-01	8.3622000000000000
2001-01-01	4.9766900000000005
2002-01-01	5.2886400000000000
2003-01-01	6.1510000000000000
2004-01-01	6.8954100000000010
2005-01-01	6.6339200000000000
2006-01-01	7.3324500000000000
2007-01-01	7.0524100000000010
2008-01-01	5.9064000000000000
2009-01-01	10.1354000000000000
2010-01-01	11.8733000000000000
2011-01-01	12.4353000000000000
2012-01-01	13.6936000000000000
2013-01-01	17.6370000000000000
2014-01-01	20.6256000000000000
2015-01-01	10.4722000000000000
2016-01-01	10.3922000000000000