Year	Percent
1990-01-01	25.3328000000000000
1991-01-01	21.0701000000000000
1992-01-01	26.9318000000000000
1993-01-01	50.8812000000000000
1994-01-01	47.8896000000000000
1995-01-01	39.8802000000000000
1996-01-01	32.6007000000000000
1997-01-01	25.5257000000000000
1998-01-01	21.4671000000000000
1999-01-01	23.8068000000000000
2000-01-01	20.3055000000000000
2001-01-01	7.5191899999999990
2002-01-01	9.0604900000000000
2003-01-01	7.5360900000000000
2004-01-01	6.4661700000000000
2005-01-01	8.0123600000000010
2006-01-01	12.7745000000000000
2007-01-01	14.5611000000000000
2008-01-01	6.4692300000000005
2009-01-01	5.4571900000000000
2010-01-01	4.4324900000000005
2011-01-01	5.4722599999999995
2012-01-01	5.6004900000000000
2013-01-01	3.4842100000000000
2014-01-01	4.1166500000000000
2015-01-01	2.2743599999999997
2016-01-01	4.0178800000000000
2017-01-01	6.8838500000000000