Year	Percent
2000-01-01	18.09848019718800
2001-01-01	19.84829756012060
2002-01-01	20.89862051582110
2003-01-01	20.40099689525360
2004-01-01	19.92252970517360
2005-01-01	19.14363874746320
2006-01-01	14.92622974051700
2007-01-01	10.34649702702310
2008-01-01	7.95276372885768
2009-01-01	8.65973517579789
2010-01-01	10.02465852378660
2011-01-01	10.39778527823840
2012-01-01	10.90751168692680
2013-01-01	11.11482516557500
2014-01-01	9.59035754320526
2015-01-01	7.71035612776476
2016-01-01	6.22580493040447
2017-01-01	4.90758597415221