Year	Percent
1997-01-01	6.89655
1998-01-01	6.89655
1999-01-01	6.89655
2000-01-01	6.89655
2001-01-01	62.18490
2002-01-01	49.05660
2003-01-01	48.14810
2004-01-01	38.80600
2005-01-01	34.52910
2006-01-01	24.04810
2007-01-01	21.70820
2008-01-01	20.17800
2009-01-01	11.67610
2010-01-01	16.87500
2011-01-01	16.57140
2012-01-01	9.88764
2013-01-01	8.58896
2014-01-01	5.82524
2015-01-01	6.10481
2016-01-01	8.86912