Year	Percent
1994-01-01	42.07
1995-01-01	44.70
1996-01-01	48.51
1997-01-01	51.44
1998-01-01	54.47
1999-01-01	58.94
2000-01-01	58.10
2001-01-01	56.24
2002-01-01	55.76
2003-01-01	59.64
2004-01-01	62.62
2005-01-01	68.70
2006-01-01	68.80
2007-01-01	69.05
2008-01-01	69.61
2009-01-01	104.98
2010-01-01	110.34
2011-01-01	120.72
2012-01-01	127.90
2013-01-01	129.43
2014-01-01	143.53
2015-01-01	144.43