Year	Percent
1987-01-01	1.1589700000000000
1988-01-01	2.2298500000000000
1989-01-01	1.6645000000000000
1990-01-01	1.6645000000000000
1991-01-01	1.1903200000000000
1992-01-01	1.0520399999999999
1993-01-01	1.3126500000000000
1994-01-01	1.8113200000000000
1995-01-01	1.7750099999999998
1996-01-01	1.6364000000000000
1997-01-01	2.2857000000000000
1998-01-01	2.1147299999999998
1999-01-01	2.3855900000000000
2000-01-01	1.8146799999999998
2001-01-01	1.1553200000000001
2002-01-01	1.1553200000000001
2003-01-01	1.1553200000000001
2004-01-01	1.0005300000000000
2005-01-01	0.7986570000000000
2006-01-01	3.1508800000000000
2007-01-01	2.7603800000000000
2008-01-01	1.9164800000000000
2009-01-01	1.9688000000000000
2010-01-01	2.1425300000000000
2011-01-01	1.8273900000000000
2012-01-01	1.6756400000000002
2013-01-01	2.6964200000000003
2014-01-01	3.4112600000000000
2015-01-01	6.6999600000000010
2016-01-01	18.6370000000000000