Year	Percent
1998-01-01	2.600000
1999-01-01	1.700000
2000-01-01	1.600000
2001-01-01	1.500000
2002-01-01	1.400000
2003-01-01	1.900000
2004-01-01	1.100000
2005-01-01	0.800000
2006-01-01	0.800000
2007-01-01	0.100000
2008-01-01	0.500000
2009-01-01	0.800000
2010-01-01	0.783563
2011-01-01	0.654055
2012-01-01	0.700062
2013-01-01	0.614388
2014-01-01	1.238370
2015-01-01	1.165110
2016-01-01	1.039350