Year	Percent
1992-01-01	3.7975900000000000
1993-01-01	4.1315100000000000
1994-01-01	3.6253900000000003
1995-01-01	2.6646900000000002
1996-01-01	1.7061600000000000
1997-01-01	1.0110400000000000
1998-01-01	0.5031500000000000
1999-01-01	0.1792470000000000
2000-01-01	0.0633950000000000
2001-01-01	0.0074300000000000
2002-01-01	0.0081680000000000
2003-01-01	0.0070940000000000
2004-01-01	1.1046700000000000
2005-01-01	1.4813500000000000
2006-01-01	1.6744200000000000
2007-01-01	1.6675500000000000
2008-01-01	1.8083900000000002
2009-01-01	1.6995900000000002
2010-01-01	1.5082200000000001
2011-01-01	1.3804100000000001
2012-01-01	1.2956299999999998
2013-01-01	1.3247100000000000
2014-01-01	1.6727299999999998
2015-01-01	1.6075700000000002
2016-01-01	3.6310599999999997