Year	Percent
1997-01-01	0.96386100000000010
1998-01-01	2.68827000000000000
1999-01-01	0.95235200000000010
2000-01-01	2.55798000000000000
2001-01-01	3.26071000000000000
2002-01-01	2.44340999999999960
2003-01-01	1.84105000000000000
2004-01-01	2.02481000000000000
2005-01-01	2.09658000000000000
2006-01-01	1.75430000000000000
2007-01-01	2.96592999999999970
2008-01-01	2.51721000000000000
2009-01-01	2.51721000000000000
2010-01-01	2.91697000000000000
2011-01-01	0.21746500000000002
2012-01-01	2.99869000000000030
2013-01-01	2.04182000000000000
2014-01-01	2.08639000000000000
2015-01-01	1.47160000000000000
2016-01-01	1.53139000000000000