Year	Percent
1998-01-01	42.90000
1999-01-01	38.60000
2000-01-01	17.70000
2001-01-01	11.50000
2002-01-01	16.50000
2003-01-01	13.50000
2004-01-01	11.90000
2005-01-01	9.10000
2006-01-01	8.10000
2007-01-01	7.90000
2008-01-01	5.70000
2009-01-01	5.20000
2010-01-01	3.88786
2011-01-01	2.93262
2012-01-01	2.43019
2013-01-01	2.30383
2014-01-01	2.30523
2015-01-01	2.68283
2016-01-01	2.98570