Year	Percent
1988-01-01	2.265360000000000000
1989-01-01	3.257950000000000000
1990-01-01	3.909459999999999700
1991-01-01	3.018120000000000000
1992-01-01	7.213310000000001000
1993-01-01	1.070490000000000000
1994-01-01	1.431550000000000000
1995-01-01	1.144639999999999900
1996-01-01	1.036830000000000000
1997-01-01	0.789525000000000000
1998-01-01	0.638461000000000000
1999-01-01	0.108717000000000010
2000-01-01	0.229568000000000000
2001-01-01	0.057260000000000005
2002-01-01	0.389282000000000000
2003-01-01	0.134553000000000000
2004-01-01	0.208240000000000000
2005-01-01	0.115090000000000010
2006-01-01	0.164444000000000000
2007-01-01	0.167410000000000000
2008-01-01	0.278773000000000000
2009-01-01	0.335052000000000000
2010-01-01	0.329955999999999970
2011-01-01	0.320280000000000000
2012-01-01	0.135742000000000000
2013-01-01	0.178479000000000000
2014-01-01	0.175985000000000000
2015-01-01	0.503595000000000000
2016-01-01	1.384690000000000000