Year	Percent
1997-01-01	34.10840
1998-01-01	34.10840
1999-01-01	34.10840
2000-01-01	34.10840
2001-01-01	10.62980
2002-01-01	10.18340
2003-01-01	5.49430
2004-01-01	9.93702
2005-01-01	17.45700
2006-01-01	15.16910
2007-01-01	24.68140
2008-01-01	14.80350
2009-01-01	15.94810
2010-01-01	16.94840
2011-01-01	27.58880
2012-01-01	26.11240
2013-01-01	21.40750
2014-01-01	18.34970
2015-01-01	12.98840
2016-01-01	6.10191