Year	Percent
1996-01-01	19.1757
1997-01-01	17.6706
1998-01-01	13.5388
1999-01-01	29.7566
2000-01-01	14.0849
2001-01-01	14.0849
2002-01-01	30.8513
2003-01-01	30.8513
2004-01-01	34.8132
2005-01-01	28.2839
2006-01-01	25.3620
2007-01-01	16.1823
2008-01-01	26.1778
2009-01-01	13.8143
2010-01-01	15.2104
2011-01-01	20.6290
2012-01-01	22.8334
2013-01-01	23.0414
2014-01-01	21.8228
2015-01-01	20.5987
2016-01-01	22.3231