Year	Percent
1999-01-01	7.3420000000000005
2000-01-01	12.2862000000000000
2001-01-01	22.0021000000000000
2002-01-01	20.7898000000000000
2003-01-01	21.7359000000000000
2004-01-01	22.1772000000000000
2005-01-01	22.3559999999999980
2006-01-01	27.4471000000000000
2007-01-01	27.1107000000000000
2008-01-01	14.4624000000000000
2009-01-01	24.7465000000000000
2010-01-01	24.1765000000000000
2011-01-01	19.1867000000000000
2012-01-01	21.0932000000000000
2013-01-01	23.7655000000000000
2014-01-01	23.8713000000000000
2015-01-01	26.5492000000000000
2016-01-01	29.4143000000000000