Year	Percent
1989-01-01	0.30187600000000003
1990-01-01	0.38505100000000003
1991-01-01	0.40253800000000000
1992-01-01	0.43190100000000003
1993-01-01	0.39693500000000000
1994-01-01	0.44877300000000000
1995-01-01	0.29251800000000000
1996-01-01	0.33876200000000000
1997-01-01	2.09668000000000000
1998-01-01	7.55296999999999900
1999-01-01	9.84045000000000000
2000-01-01	14.84200000000000000
2001-01-01	12.43990000000000000
2002-01-01	12.02890000000000000
2003-01-01	11.26020000000000000
2004-01-01	9.61885000000000000
2005-01-01	9.10306999999999900
2006-01-01	9.57198000000000000
2007-01-01	10.18580000000000000
2008-01-01	8.39814000000000000
2009-01-01	11.19570000000000000
2010-01-01	10.70830000000000000
2011-01-01	8.32086000000000000
2012-01-01	10.93250000000000000
2013-01-01	12.00360000000000000
2014-01-01	11.91910000000000000
2015-01-01	16.35910000000000000
2016-01-01	17.34000000000000000