Year	Percent
1980-01-01	2.09104000000000000
1981-01-01	1.61987000000000010
1982-01-01	1.41719000000000000
1983-01-01	1.18207000000000020
1984-01-01	0.84695000000000000
1985-01-01	0.24623499999999998
1986-01-01	0.25830200000000000
1987-01-01	0.21870000000000000
1988-01-01	0.25722000000000000
1989-01-01	0.36018300000000000
1990-01-01	0.31924600000000003
1991-01-01	0.27253299999999997
1992-01-01	0.42638400000000004
1993-01-01	0.47793199999999997
1994-01-01	2.03200999999999960
1995-01-01	1.69842000000000000
1996-01-01	2.03954000000000000
1997-01-01	1.85425999999999980
1998-01-01	1.85313000000000000
1999-01-01	1.49636000000000010
2000-01-01	1.17420000000000000
2001-01-01	2.94958000000000000
2002-01-01	3.19410000000000000
2003-01-01	3.07767000000000000
2004-01-01	6.06551000000000000
2005-01-01	6.78916000000000100
2006-01-01	7.16328000000000000
2007-01-01	2.95052000000000000
2008-01-01	9.17193000000000000
2009-01-01	9.79066000000000000
2010-01-01	10.10020000000000000
2011-01-01	8.32277000000000000
2012-01-01	9.50849000000000000
2013-01-01	10.25580000000000000
2014-01-01	12.25020000000000000
2015-01-01	10.84060000000000000
2016-01-01	12.87400000000000000