Year	Percent
1990-01-01	7.7100000000000000
1991-01-01	6.0591700000000000
1992-01-01	5.8958300000000000
1993-01-01	6.1566700000000000
1994-01-01	15.6338000000000000
1995-01-01	15.0256000000000000
1996-01-01	11.8350000000000000
1997-01-01	8.9891700000000000
1998-01-01	11.5108000000000000
1999-01-01	10.8475000000000000
2000-01-01	8.8991700000000000
2001-01-01	6.9400000000000000
2002-01-01	7.5766700000000000
2003-01-01	7.9850000000000000
2004-01-01	5.8975000000000000
2005-01-01	5.1833300000000010
2006-01-01	5.2141699999999990
2007-01-01	6.3983300000000005
2008-01-01	6.2175000000000000
2009-01-01	3.4841699999999998
2010-01-01	3.5466699999999998
2011-01-01	2.5600000000000000
2012-01-01	1.8708300000000000
2013-01-01	1.3916700000000000
2014-01-01	2.5300000000000000
2015-01-01	4.5083300000000000
2016-01-01	5.6900000000000000