Year	Percent
1997-01-01	0.30801600000000000
1998-01-01	4.74972000000000000
1999-01-01	6.13577000000000000
2000-01-01	6.13577000000000000
2001-01-01	6.13577000000000000
2002-01-01	4.23185000000000000
2003-01-01	2.68324000000000000
2004-01-01	2.39083000000000000
2005-01-01	2.68427000000000000
2006-01-01	2.70547000000000000
2007-01-01	2.99602999999999970
2008-01-01	3.09734000000000000
2009-01-01	2.56740000000000000
2010-01-01	2.81669000000000040
2011-01-01	4.14152000000000000
2012-01-01	1.16373000000000000
2013-01-01	0.35496300000000003
2014-01-01	1.88687000000000000
2015-01-01	2.67789000000000000
2016-01-01	1.91457000000000000