Year	Percent
1996-01-01	22.1609
1997-01-01	22.5474
1998-01-01	25.6033
1999-01-01	21.3826
2000-01-01	21.4935
2001-01-01	17.9572
2002-01-01	21.8326
2003-01-01	23.1561
2004-01-01	21.4832
2005-01-01	15.8490
2006-01-01	30.1124
2007-01-01	33.5317
2008-01-01	50.8965
2009-01-01	52.6251
2010-01-01	45.7388
2011-01-01	33.3988
2012-01-01	14.9142
2013-01-01	12.9850
2014-01-01	11.1743
2015-01-01	41.1547
2016-01-01	41.7468