Year	Percent
1991-01-01	62.7581000000000000
1992-01-01	33.8686000000000000
1993-01-01	20.6273000000000000
1994-01-01	11.5745000000000000
1995-01-01	10.8842000000000000
1996-01-01	11.2745000000000000
1997-01-01	13.5929000000000000
1998-01-01	3.9643200000000000
1999-01-01	3.4825600000000000
2000-01-01	3.5685599999999997
2001-01-01	4.6742500000000000
2002-01-01	4.8304900000000000
2003-01-01	4.0467400000000000
2004-01-01	4.4354800000000000
2005-01-01	4.5824000000000000
2006-01-01	4.2570600000000000
2007-01-01	3.7031099999999997
2008-01-01	2.6585200000000000
2009-01-01	5.3250199999999990
2010-01-01	4.4343200000000000
2011-01-01	5.0370200000000000
2012-01-01	6.4082400000000000
2013-01-01	6.1594500000000000
2014-01-01	5.6748699999999990
2015-01-01	5.3049800000000005
2016-01-01	5.2199800000000005