Year	Percent
1999-01-01	1.2342100000000000
2000-01-01	2.0020700000000002
2001-01-01	1.7052800000000000
2002-01-01	2.0203200000000000
2003-01-01	1.9491900000000002
2004-01-01	1.4139300000000000
2005-01-01	1.0542400000000000
2006-01-01	1.0904800000000000
2007-01-01	1.0731300000000000
2008-01-01	0.1979550000000000
2009-01-01	0.2017070000000000
2010-01-01	0.3655230000000000
2011-01-01	0.4102500000000000
2012-01-01	0.4157340000000000
2013-01-01	0.4232910000000000
2014-01-01	0.4283590000000000