Year	Percent
1999-01-01	1.7168500000000000
2000-01-01	1.6552400000000000
2001-01-01	1.7683000000000000
2002-01-01	1.0142400000000000
2003-01-01	1.1485500000000000
2004-01-01	0.7696160000000000
2005-01-01	0.9121500000000000
2006-01-01	1.0117300000000000
2007-01-01	0.8162060000000000
2008-01-01	0.9401649999999999
2009-01-01	0.9274950000000001
2010-01-01	0.9363379999999999
2011-01-01	0.9487810000000000
2012-01-01	0.9024230000000000
2013-01-01	0.8908410000000000
2014-01-01	0.8634139999999999
2015-01-01	0.8356220000000000