Year	Percent
1997-01-01	50.033500000000000
1998-01-01	29.575500000000000
1999-01-01	20.686700000000000
2000-01-01	3.069450000000000
2001-01-01	4.727110000000000
2002-01-01	20.018300000000000
2003-01-01	18.056400000000000
2004-01-01	25.539500000000000
2005-01-01	15.106100000000000
2006-01-01	19.114700000000000
2007-01-01	16.294200000000000
2008-01-01	13.772200000000000
2009-01-01	4.153270000000000
2010-01-01	10.294100000000000
2011-01-01	10.087200000000000
2012-01-01	10.456400000000000
2013-01-01	9.509920000000000
2014-01-01	6.405530000000001
2015-01-01	2.066850000000000
2016-01-01	8.029160000000001