Year	Percent
1996-01-01	32.7519
1997-01-01	34.1772
1998-01-01	34.0577
1999-01-01	36.1922
2000-01-01	32.8698
2001-01-01	31.7943
2002-01-01	28.9748
2003-01-01	32.0240
2004-01-01	43.8429
2005-01-01	36.2966
2006-01-01	33.8213
2007-01-01	37.5650
2008-01-01	41.0022
2009-01-01	23.3788
2010-01-01	30.1074
2011-01-01	29.5853
2012-01-01	22.8031
2013-01-01	37.2340
2014-01-01	36.1069