Year	Percent
1983-01-01	3.2378500000000000
1984-01-01	3.4174300000000004
1985-01-01	3.3121300000000002
1986-01-01	3.0913800000000000
1987-01-01	2.6316000000000000
1988-01-01	4.4226199999999990
1989-01-01	3.6213000000000000
1990-01-01	2.2315099999999997
1991-01-01	1.7942099999999999
1992-01-01	1.3722100000000000
1993-01-01	0.7077620000000000
1994-01-01	0.6920530000000000
1995-01-01	0.9279059999999999
1996-01-01	0.6921370000000000
1997-01-01	1.3745500000000000
1998-01-01	0.7082240000000000
1999-01-01	0.6429520000000001
2000-01-01	0.8058950000000000
2001-01-01	1.0628600000000001
2002-01-01	1.3535400000000000
2003-01-01	1.6801400000000002
2004-01-01	1.0671700000000002
2005-01-01	0.4821460000000000
2006-01-01	0.4577220000000000
2007-01-01	0.7614529999999999
2008-01-01	10.0967000000000000
2009-01-01	12.8086000000000000
2010-01-01	2.0228500000000000
2011-01-01	1.3641299999999998
2012-01-01	0.6501480000000000
2013-01-01	0.9336730000000000
2014-01-01	1.7461500000000000
2015-01-01	3.0634000000000000
2016-01-01	1.8042500000000000