Year	Percent
1997-01-01	8.8150200000000000
1998-01-01	6.7805800000000005
1999-01-01	14.2920000000000000
2000-01-01	7.5257200000000000
2001-01-01	9.4541899999999990
2002-01-01	9.4541899999999990
2003-01-01	9.4541899999999990
2004-01-01	9.6346500000000000
2005-01-01	7.5976800000000000
2006-01-01	6.7291000000000000
2007-01-01	8.2498000000000000
2008-01-01	11.5518000000000000
2009-01-01	11.8672000000000000
2010-01-01	5.4244200000000000
2011-01-01	10.1356000000000000
2012-01-01	6.6344000000000000
2013-01-01	7.5612600000000010
2014-01-01	2.5639300000000000
2015-01-01	7.7671000000000000
2016-01-01	8.1642900000000000