Year	Percent
1990-01-01	2.3243500000000000
1991-01-01	2.5541500000000000
1992-01-01	2.7226700000000000
1993-01-01	2.6304800000000000
1994-01-01	2.7213000000000000
1995-01-01	2.7292600000000000
1996-01-01	2.3175100000000000
1997-01-01	2.3503200000000000
1998-01-01	2.5173000000000000
1999-01-01	1.9276700000000000
2000-01-01	1.9791599999999998
2001-01-01	2.2757700000000000
2002-01-01	2.7141300000000000
2003-01-01	2.7378299999999998
2004-01-01	2.6634800000000000
2005-01-01	2.7457300000000000
2006-01-01	2.6010400000000002
2007-01-01	1.6487000000000000
2008-01-01	0.1008470000000000
2009-01-01	2.0456600000000000
2010-01-01	1.9155799999999998
2011-01-01	1.8775600000000000
2012-01-01	1.8891099999999998
2013-01-01	1.3698800000000000
2014-01-01	2.1949300000000000
2015-01-01	4.4999800000000000