Year	Percent
1994-01-01	0.3847800000000000
1995-01-01	0.8597070000000000
1996-01-01	1.4078700000000002
1997-01-01	2.6956300000000000
1998-01-01	5.2184300000000010
1999-01-01	7.3738300000000000
2000-01-01	14.2354000000000000
2001-01-01	19.6104000000000000
2002-01-01	18.2559000000000000
2003-01-01	16.3899000000000000
2004-01-01	18.2494000000000000
2005-01-01	21.8207000000000000
2006-01-01	19.3361000000000000
2007-01-01	17.3230000000000000
2008-01-01	15.6911000000000000
2009-01-01	15.9468000000000000
2010-01-01	15.4615000000000000
2011-01-01	15.9569000000000000
2012-01-01	15.9070000000000000