Year	Percent
1990-01-01	0.056669000000000004
1991-01-01	0.053157000000000000
1992-01-01	0.057512000000000000
1993-01-01	0.053438000000000000
1994-01-01	0.058385000000000000
1995-01-01	0.053827000000000000
1996-01-01	0.063029000000000000
1997-01-01	0.068636000000000000
1998-01-01	0.082578000000000000
1999-01-01	0.079685000000000000
2000-01-01	0.074780000000000000
2001-01-01	0.087959000000000010
2002-01-01	0.117135999999999990
2003-01-01	0.136099000000000000
2004-01-01	0.175143000000000000
2005-01-01	0.201692000000000000
2006-01-01	0.265209000000000030
2007-01-01	0.291669000000000000
2008-01-01	0.302334000000000000
2009-01-01	0.334092000000000000
2010-01-01	0.406288000000000040
2011-01-01	0.451666000000000000
2012-01-01	0.486616000000000000
2013-01-01	0.502436000000000000
2014-01-01	0.515580000000000000