Year	Percent
1995-01-01	30.7448
1996-01-01	34.2531
1997-01-01	26.8519
1998-01-01	28.9803
1999-01-01	25.2906
2000-01-01	23.0008
2001-01-01	21.9191
2002-01-01	23.6075
2003-01-01	26.5437
2004-01-01	31.7994
2005-01-01	26.5645
2006-01-01	37.7695
2007-01-01	40.2680
2008-01-01	17.0989
2009-01-01	17.3616
2010-01-01	21.1675
2011-01-01	15.5992
2012-01-01	15.3948
2013-01-01	15.8173
2014-01-01	12.5826
2015-01-01	14.9437
2016-01-01	12.0527