Year	Percent
1983-01-01	4.5562200000000000
1984-01-01	4.7861500000000000
1985-01-01	6.4711600000000000
1986-01-01	6.6276399999999995
1987-01-01	7.9630899999999990
1988-01-01	6.4929600000000000
1989-01-01	4.8899099999999995
1990-01-01	6.0513200000000000
1991-01-01	5.3066400000000000
1992-01-01	5.2260500000000000
1993-01-01	5.6874800000000000
1994-01-01	5.0442599999999995
1995-01-01	5.5428500000000000
1996-01-01	6.7967000000000000
1997-01-01	6.9633199999999995
1998-01-01	8.8180000000000000
1999-01-01	9.9205399999999990
2000-01-01	11.7354000000000000
2001-01-01	12.1532000000000000
2002-01-01	9.4192700000000000
2003-01-01	9.0156000000000000
2004-01-01	8.8503000000000000
2005-01-01	8.1914699999999990
2006-01-01	9.4439100000000000
2007-01-01	14.3347000000000000
2008-01-01	14.7280000000000000
2009-01-01	12.4689000000000000
2010-01-01	11.3696000000000000
2011-01-01	11.9611000000000000
2012-01-01	10.4373000000000000
2013-01-01	10.3347000000000000
2014-01-01	9.8029900000000000
2015-01-01	10.2144000000000000
2016-01-01	9.0701900000000000