Year	Percent
1990-01-01	1.3351200000000000
1991-01-01	1.5707600000000000
1992-01-01	1.5624400000000000
1993-01-01	1.5606600000000000
1994-01-01	1.3003900000000000
1995-01-01	1.1636300000000000
1996-01-01	1.8873900000000001
1997-01-01	2.8941900000000000
1998-01-01	4.2185600000000000
1999-01-01	8.6464699999999990
2000-01-01	9.7755700000000000
2001-01-01	9.6565100000000000
2002-01-01	11.0830000000000000
2003-01-01	11.0295000000000000
2004-01-01	12.1079999999999990
2005-01-01	11.2302000000000000
2006-01-01	9.7932000000000000
2007-01-01	8.9712300000000000
2008-01-01	7.7450800000000010
2009-01-01	17.4273000000000000
2010-01-01	17.4355000000000000
2011-01-01	14.8038000000000000
2012-01-01	16.9122000000000000
2013-01-01	17.1709000000000000
2014-01-01	16.0526000000000000
2015-01-01	16.5040000000000000
2016-01-01	16.0551000000000000