Year	Percent
1997-01-01	11.0157000000000000
1998-01-01	7.1340900000000000
1999-01-01	5.4461300000000000
2000-01-01	17.4071000000000000
2001-01-01	10.5312000000000000
2002-01-01	10.2767000000000000
2003-01-01	12.3441000000000000
2004-01-01	9.5964100000000000
2005-01-01	9.3368399999999990
2006-01-01	6.2767500000000000
2007-01-01	5.0309800000000005
2008-01-01	4.3851400000000000
2009-01-01	3.5266100000000000
2010-01-01	5.4245000000000000
2011-01-01	6.7547600000000010
2012-01-01	5.5955300000000000
2013-01-01	5.6175600000000000
2014-01-01	5.1804600000000000
2015-01-01	3.6264100000000000
2016-01-01	4.4368500000000000