Year	Percent
1995-01-01	28.7060086525000
1996-01-01	29.1603654100000
1997-01-01	28.5751782500000
1998-01-01	27.7637531650000
1999-01-01	28.2695906250000
2000-01-01	29.5712082775000
2001-01-01	28.2071114075000
2002-01-01	25.9344004550000
2003-01-01	26.1439940900000
2004-01-01	26.7919025800000
2005-01-01	27.9909209900000
2006-01-01	28.0688660125000
2007-01-01	28.3328825075000
2008-01-01	28.8181664900000
2009-01-01	29.1079373275000
2010-01-01	29.3208413250000
2011-01-01	28.4884915900000
2012-01-01	42.4083333333333
2013-01-01	43.0250000000000
2014-01-01	43.1416666666667
2015-01-01	43.3083333333333
2016-01-01	43.6250000000000
2017-01-01	44.2666666666667