Year Percent 1996-01-01 0.56431600000000000 1997-01-01 0.54549399999999990 1998-01-01 0.83947199999999990 1999-01-01 1.10323000000000000 2000-01-01 1.30457000000000000 2001-01-01 0.77832900000000000 2002-01-01 0.10146500000000000 2003-01-01 2.19906000000000000 2004-01-01 0.87266000000000000 2005-01-01 1.10516000000000010 2006-01-01 0.88370100000000010 2007-01-01 1.49799000000000000 2008-01-01 -1.50829000000000000 2009-01-01 -0.17902200000000001 2010-01-01 0.22776000000000000 2011-01-01 0.25033400000000000 2012-01-01 0.28193700000000000 2013-01-01 0.28862400000000000 2014-01-01 0.34120400000000000 2015-01-01 0.54059600000000000 2016-01-01 0.56710000000000000