Year	Percent
1992-01-01	380.10000000000000
1993-01-01	436.61699999999996
1994-01-01	436.61699999999996
1995-01-01	615.86500000000000
1996-01-01	546.28100000000000
1997-01-01	454.71300000000000
1998-01-01	410.27600000000000
1999-01-01	408.81300000000005
2000-01-01	407.41900000000004
2001-01-01	406.28700000000000
2002-01-01	432.06000000000000
2003-01-01	449.22100000000000
2004-01-01	460.86600000000000
2005-01-01	486.51300000000003
2006-01-01	510.04400000000004
2007-01-01	507.37699999999995
2008-01-01	577.92400000000000
2009-01-01	685.14199999999990
2010-01-01	772.62899999999990
2011-01-01	879.66199999999990
2012-01-01	846.16800000000000
2013-01-01	756.47899999999990
2014-01-01	702.09300000000010
2015-01-01	684.19500000000000
2016-01-01	681.17500000000000