Year	Percent
1996-01-01	35.0834
1997-01-01	72.2719
1998-01-01	49.4192
1999-01-01	36.5147
2000-01-01	37.3917
2001-01-01	32.9512
2002-01-01	35.9474
2003-01-01	35.3407
2004-01-01	37.6969
2005-01-01	40.8260
2006-01-01	43.8194
2007-01-01	48.6782
2008-01-01	49.2048
2009-01-01	45.8471
2010-01-01	44.7301
2011-01-01	47.8900
2012-01-01	56.6412
2013-01-01	49.7042
2014-01-01	49.6772