Year	Percent
1991-01-01	4.4510300000000000
1992-01-01	4.7980500000000000
1993-01-01	3.2914199999999996
1994-01-01	3.2242599999999997
1995-01-01	4.4516000000000000
1996-01-01	6.7176300000000010
1997-01-01	6.9027899999999995
1998-01-01	9.5485300000000000
1999-01-01	11.2321000000000000
2000-01-01	10.7395000000000000
2001-01-01	12.5761000000000000
2002-01-01	14.6747000000000000
2003-01-01	17.1557000000000000
2004-01-01	19.2163000000000000
2005-01-01	20.7563000000000000
2006-01-01	23.6601000000000000
2007-01-01	29.4587000000000000
2008-01-01	34.4748000000000000
2009-01-01	36.3223000000000000
2010-01-01	32.2212000000000000
2011-01-01	31.7192000000000000
2012-01-01	34.6408000000000000
2013-01-01	36.4899000000000000
2014-01-01	34.9292000000000000
2015-01-01	31.8073000000000000
2016-01-01	27.6011000000000000