Year	Percent
1996-01-01	34.0279
1997-01-01	32.1161
1998-01-01	28.0831
1999-01-01	25.3879
2000-01-01	25.3139
2001-01-01	27.2672
2002-01-01	27.3919
2003-01-01	33.5656
2004-01-01	34.4641
2005-01-01	34.9704
2006-01-01	39.4139
2007-01-01	51.3158
2008-01-01	47.0639
2009-01-01	41.9472
2010-01-01	40.5973
2011-01-01	34.5622
2012-01-01	22.3754
2013-01-01	14.7755
2014-01-01	17.5783
2015-01-01	38.0828
2016-01-01	44.2682