Year	Percent
1990-01-01	1.8060100000000000
1991-01-01	1.7890300000000000
1992-01-01	1.9794000000000000
1993-01-01	1.8038700000000000
1994-01-01	2.0415500000000000
1995-01-01	2.5416600000000000
1996-01-01	2.3525800000000000
1997-01-01	3.1566000000000000
1998-01-01	2.2534300000000000
1999-01-01	2.6422500000000000
2000-01-01	2.8118800000000000
2001-01-01	3.5406800000000005
2002-01-01	3.8686500000000000
2003-01-01	5.3634800000000000
2004-01-01	4.3008800000000000
2005-01-01	3.9668300000000003
2006-01-01	3.6419300000000003
2007-01-01	4.9258400000000000
2008-01-01	0.8485440000000001
2009-01-01	1.0796800000000000
2010-01-01	1.0133400000000000
2011-01-01	1.4735500000000000
2012-01-01	1.5560500000000000
2013-01-01	1.5156300000000000
2014-01-01	1.1521200000000000
2015-01-01	2.0281400000000000
2016-01-01	2.2464800000000000