Year	Percent
1989-01-01	27.713700000000000
1990-01-01	29.968300000000000
1991-01-01	33.558900000000000
1992-01-01	34.423900000000000
1993-01-01	36.205999999999996
1994-01-01	38.763100000000000
1995-01-01	36.576000000000000
1996-01-01	35.885100000000000
1997-01-01	38.797000000000000
1998-01-01	42.968800000000000
1999-01-01	44.383100000000000
2000-01-01	36.661200000000000
2001-01-01	38.760100000000000
2002-01-01	37.711900000000000
2003-01-01	35.379400000000000
2004-01-01	31.461500000000000
2005-01-01	30.230800000000000
2006-01-01	26.818700000000000
2007-01-01	28.401500000000000
2008-01-01	26.419600000000000
2009-01-01	27.617900000000000
2010-01-01	22.189700000000000
2011-01-01	24.444900000000000
2012-01-01	27.871900000000000
2013-01-01	31.609200000000000
2014-01-01	33.946200000000000
2015-01-01	33.934200000000000
2016-01-01	36.407400000000000