Year	Percent
1995-01-01	52.6956119225000
1996-01-01	52.8136755675000
1997-01-01	53.1264258275000
1998-01-01	53.7650086575000
1999-01-01	55.0135734775000
2000-01-01	56.1000460950000
2001-01-01	56.0133935425000
2002-01-01	56.2105029750000
2003-01-01	57.1623027700000
2004-01-01	57.6520896950000
2005-01-01	58.1266520100000
2006-01-01	58.6671845525000
2007-01-01	59.3963897025000
2008-01-01	59.5430207775000
2009-01-01	60.5247964350000
2010-01-01	60.9388684000000
2011-01-01	60.9287302975000
2012-01-01	67.1000000000000
2013-01-01	67.2833333333333
2014-01-01	68.3500000000000
2015-01-01	68.2750000000000
2016-01-01	68.6333333333334
2017-01-01	68.6750000000000