Year	Percent
1990-01-01	12.46510000000000
1991-01-01	13.02360000000000
1992-01-01	12.62940000000000
1993-01-01	11.25300000000000
1994-01-01	9.75721000000000
1995-01-01	12.17240000000000
1996-01-01	14.22460000000000
1997-01-01	29.27340000000000
1998-01-01	29.35860000000000
1999-01-01	37.92770000000000
2000-01-01	87.59870000000000
2001-01-01	92.06200000000001
2002-01-01	98.28490000000000
2003-01-01	99.06620000000000
2004-01-01	98.97730000000000
2005-01-01	99.02930000000000
2006-01-01	99.11740000000000
2007-01-01	98.63930000000000
2008-01-01	87.44260000000000
2009-01-01	73.18990000000000
2010-01-01	67.15890000000000
2011-01-01	59.17850000000000
2012-01-01	54.81280000000000
2013-01-01	60.70510000000000