Year	Percent
1995-01-01	23
1996-01-01	24
1997-01-01	28
1998-01-01	29
1999-01-01	29
2000-01-01	33
2001-01-01	35
2002-01-01	34
2003-01-01	36
2004-01-01	38
2005-01-01	38.5
2006-01-01	40
2007-01-01	42.5
2008-01-01	45.5
2009-01-01	44.5
2010-01-01	46
2011-01-01	47
2012-01-01	46.5
2013-01-01	47