Year	Percent
1997-01-01	11.984100000000000
1998-01-01	11.984100000000000
1999-01-01	11.984100000000000
2000-01-01	11.984100000000000
2001-01-01	5.577440000000000
2002-01-01	3.989840000000000
2003-01-01	4.984600000000000
2004-01-01	3.955310000000000
2005-01-01	5.171050000000000
2006-01-01	5.023680000000001
2007-01-01	8.440790000000000
2008-01-01	8.767700000000000
2009-01-01	9.266940000000000
2010-01-01	9.928750000000000
2011-01-01	12.891300000000000
2012-01-01	12.760000000000000
2013-01-01	10.638900000000000
2014-01-01	9.347560000000001
2015-01-01	8.249180000000000
2016-01-01	7.974270000000000