Year	Percent
1987-01-01	896.141000000000100
1988-01-01	358.620000000000000
1989-01-01	18.130500000000000
1990-01-01	18.130500000000000
1991-01-01	18.130500000000000
1992-01-01	22.772100000000000
1993-01-01	21.342300000000000
1994-01-01	19.473600000000000
1995-01-01	19.128700000000000
1996-01-01	16.428600000000000
1997-01-01	15.571700000000000
1998-01-01	15.714000000000000
1999-01-01	16.813800000000000
2000-01-01	20.854900000000000
2001-01-01	18.934700000000000
2002-01-01	20.019300000000000
2003-01-01	22.764600000000000
2004-01-01	21.878300000000000
2005-01-01	21.022000000000000
2006-01-01	24.813300000000000
2007-01-01	23.491999999999997
2008-01-01	26.320800000000000
2009-01-01	30.729500000000000
2010-01-01	35.047800000000000
2011-01-01	36.521800000000000
2012-01-01	37.735800000000000
2013-01-01	41.957000000000000
2014-01-01	45.402400000000000
2015-01-01	49.313900000000000
2016-01-01	50.556999999999995