Year	Percent
1991-01-01	0.67725700000000000
1992-01-01	0.59852700000000000
1993-01-01	0.58421700000000000
1994-01-01	0.53282400000000000
1995-01-01	0.49511900000000000
1996-01-01	29.25290000000000000
1997-01-01	24.20370000000000000
1998-01-01	0.18076199999999998
1999-01-01	4.59772000000000000
2000-01-01	5.66813000000000100
2001-01-01	6.51766000000000000
2002-01-01	5.97675000000000000
2003-01-01	8.28723999999999900
2004-01-01	11.63040000000000000
2005-01-01	12.48020000000000000
2006-01-01	15.16180000000000000
2007-01-01	14.83320000000000000
2008-01-01	14.23970000000000000
2009-01-01	17.95720000000000000
2010-01-01	17.31790000000000000
2011-01-01	17.85220000000000000
2012-01-01	18.45770000000000000
2013-01-01	21.41330000000000000
2014-01-01	18.71550000000000000
2015-01-01	19.25180000000000000
2016-01-01	16.85490000000000000