Year	Percent
1982-01-01	6.7083300000000000
1983-01-01	3.7500000000000000
1984-01-01	3.5000000000000000
1985-01-01	4.4166700000000000
1986-01-01	5.1258300000000006
1987-01-01	9.7675000000000000
1988-01-01	13.5117000000000000
1989-01-01	13.5517000000000000
1990-01-01	11.4008000000000000
1991-01-01	11.5608000000000000
1992-01-01	12.6575000000000000
1993-01-01	13.1233000000000000
1994-01-01	15.3025000000000000
1995-01-01	12.8183000000000000
1996-01-01	8.9841699999999990
1997-01-01	9.4516700000000000
1998-01-01	9.7166700000000000
1999-01-01	11.4287000000000000
2000-01-01	11.5072000000000000
2001-01-01	12.0611000000000000
2002-01-01	14.9583000000000000
2003-01-01	15.1736000000000000
2004-01-01	13.9117000000000000
2005-01-01	14.5133000000000000
2006-01-01	12.4167000000000000
2007-01-01	6.4475000000000000
2008-01-01	11.6775000000000000
2009-01-01	12.7642000000000000
2010-01-01	11.7675000000000000
2011-01-01	12.1367000000000000
2012-01-01	13.4739000000000000
2013-01-01	11.3108000000000000
2014-01-01	11.5803000000000000
2015-01-01	11.8625000000000000
2016-01-01	10.4261000000000000