Year	Percent
1996-01-01	49.6492
1997-01-01	46.0137
1998-01-01	46.0651
1999-01-01	46.7928
2000-01-01	36.9111
2001-01-01	38.4146
2002-01-01	34.2634
2003-01-01	26.7164
2004-01-01	22.1708
2005-01-01	15.4098
2006-01-01	30.5180
2007-01-01	24.8578
2008-01-01	32.8683
2009-01-01	45.3885
2010-01-01	45.0856
2011-01-01	34.4716
2012-01-01	30.5925
2013-01-01	25.7391
2014-01-01	24.7477
2015-01-01	24.7881
2016-01-01	27.2502