Year	Percent
1996-01-01	31.947337721856600
1997-01-01	23.435427849700500
1998-01-01	10.457382584672100
1999-01-01	37.030925836934400
2000-01-01	18.700734283802300
2001-01-01	6.919679894230410
2002-01-01	2.134209863102430
2003-01-01	2.974612951843540
2004-01-01	4.110650847233830
2005-01-01	4.338673918443100
2006-01-01	5.552123331625400
2007-01-01	10.230103266048500
2008-01-01	24.520102423410100
2009-01-01	6.836562481053630
2010-01-01	7.967722255796910
2011-01-01	16.636326273149600
2012-01-01	2.768442365409480
2013-01-01	6.613752023580860
2014-01-01	7.534247297758820
2015-01-01	6.503318389933810
2016-01-01	0.388838296895887
2017-01-01	3.175309863799400