Year	Percent
1999-01-01	5.300000
2000-01-01	3.400000
2001-01-01	8.000000
2002-01-01	7.700000
2003-01-01	6.700000
2004-01-01	5.000000
2005-01-01	3.800000
2006-01-01	2.800000
2007-01-01	1.500000
2008-01-01	1.400000
2009-01-01	2.000000
2010-01-01	1.406350
2011-01-01	1.060460
2012-01-01	1.042630
2013-01-01	0.866942
2014-01-01	0.756533
2015-01-01	0.924063
2016-01-01	1.222530