Year	Percent
1998-01-01	31.6000000000000000
1999-01-01	23.7000000000000000
2000-01-01	13.7000000000000000
2001-01-01	12.3000000000000000
2002-01-01	7.9000000000000000
2003-01-01	3.7000000000000000
2004-01-01	2.6000000000000000
2005-01-01	5.0000000000000000
2006-01-01	3.2000000000000000
2007-01-01	2.5000000000000000
2008-01-01	2.5000000000000000
2009-01-01	5.3000000000000000
2010-01-01	5.8363100000000000
2011-01-01	5.6128700000000000
2012-01-01	5.2225100000000000
2013-01-01	5.1393800000000000
2014-01-01	5.3468900000000000
2015-01-01	4.8708700000000000
2016-01-01	4.4436599999999995