Year	Percent
1982-01-01	21.476200000000000
1983-01-01	21.884800000000000
1984-01-01	22.127300000000000
1985-01-01	23.451600000000000
1986-01-01	25.087800000000000
1987-01-01	29.293200000000000
1988-01-01	31.161300000000000
1989-01-01	28.604400000000000
1990-01-01	30.523200000000000
1991-01-01	33.037900000000000
1992-01-01	37.451700000000000
1993-01-01	40.465400000000000
1994-01-01	37.666400000000000
1995-01-01	36.087200000000000
1996-01-01	36.558500000000000
1997-01-01	35.917300000000000
1998-01-01	35.751200000000000
1999-01-01	36.380400000000000
2000-01-01	36.001800000000000
2001-01-01	36.223000000000000
2002-01-01	36.640000000000000
2003-01-01	37.590700000000000
2004-01-01	38.408300000000000
2005-01-01	39.784700000000000
2006-01-01	41.508500000000000
2007-01-01	44.118400000000000
2008-01-01	46.049300000000000
2009-01-01	50.652500000000000
2010-01-01	50.087800000000000
2011-01-01	49.146100000000000
2012-01-01	49.454900000000000
2013-01-01	46.803400000000000
2014-01-01	45.409700000000000
2015-01-01	45.083999999999996
2016-01-01	45.733800000000000