Year	Percent
1987-01-01	0.8106120000000000
1988-01-01	0.8106120000000000
1989-01-01	2.4820400000000000
1990-01-01	12.3184000000000000
1991-01-01	32.9138000000000000
1992-01-01	15.3747000000000000
1993-01-01	2.3609299999999998
1994-01-01	22.0006000000000000
1995-01-01	20.4433000000000000
1996-01-01	14.1313000000000000
1997-01-01	8.3448900000000000
1998-01-01	5.8839700000000000
1999-01-01	2.8903800000000000
2000-01-01	2.7656800000000000
2001-01-01	3.4680400000000002
2002-01-01	3.9379199999999996
2003-01-01	7.1373899999999990
2004-01-01	9.8669200000000000
2005-01-01	8.7591600000000010
2006-01-01	7.9969000000000000
2007-01-01	7.6090899999999990
2008-01-01	8.8032000000000000
2009-01-01	16.8798000000000000
2010-01-01	16.6119000000000000
2011-01-01	14.9810000000000000
2012-01-01	19.1969000000000000
2013-01-01	19.2747000000000000
2014-01-01	31.3819999999999980
2015-01-01	30.2669000000000000
2016-01-01	30.1994000000000000