Year	Percent
1991-01-01	41.1076000000000000
1992-01-01	22.2263000000000000
1993-01-01	6.5576399999999990
1994-01-01	2.8952200000000000
1995-01-01	1.5136700000000000
1996-01-01	2.2179300000000000
1997-01-01	3.9812500000000000
1998-01-01	4.3869000000000000
1999-01-01	3.4782400000000000
2000-01-01	3.4457199999999997
2001-01-01	2.5900700000000000
2002-01-01	2.3238100000000000
2003-01-01	2.9408300000000000
2004-01-01	1.6132799999999998
2005-01-01	1.0575700000000001
2006-01-01	0.8659270000000000
2007-01-01	0.8183390000000000
2008-01-01	0.3946190000000000
2009-01-01	0.3446470000000000
2010-01-01	0.9849620000000001
2011-01-01	2.8535200000000000
2012-01-01	4.2504599999999995
2013-01-01	9.9261600000000010
2014-01-01	10.2101000000000000
2015-01-01	12.2505000000000000
2016-01-01	15.2686000000000000