Year	Percent
1994-01-01	56.402102
1995-01-01	41.220000
1996-01-01	23.940000
1997-01-01	39.870000
1998-01-01	31.240000
1999-01-01	18.990000
2000-01-01	16.190000
2001-01-01	19.050000
2002-01-01	23.030000
2003-01-01	16.910000
2004-01-01	17.500000
2005-01-01	18.240000
2006-01-01	13.190000
2007-01-01	11.180000
2008-01-01	13.660000
2009-01-01	8.650000
2010-01-01	10.660000
2011-01-01	10.900000
2012-01-01	7.160000
2013-01-01	9.900000
2014-01-01	11.580000
2015-01-01	14.150000
2016-01-01	13.650000
2017-01-01	7.000000