Year % 1998 50.97910990004271 1999 29.875587522224066 2000 22.279527069679517 2001 24.356550305899862 2002 27.401584080924 2003 19.657806153557626 2004 12.667472557145462 2005 8.719842375575762 2006 4.055995563296094 2007 9.137236010819734 2008 -0.7125807395010028 2009 19.484338531706044 2010 -13.730174309331689 2011 1.2944583627866992 2012 4.725331319425123 2013 15.134097836725353 2014 10.774052462664075 2015 18.838078995219092 2016 16.26167578091163 2017 8.309060219630837 2018 9.034455713520215 2019 6.387440866511049 2020 12.751251517645038 2021 1.38672967252835