Year % of GDP 1990 0.421504288803926 1991 0.227904946317011 1992 0.292392494867411 1993 0.339872444302076 1994 0.187943893963925 1995 0.170891867189209 1996 0.292046836899432 1997 0.23178705274066 1998 0.0573206611540123 1999 0.219647962907225 2000 0.4032554633902 2001 0.240596285001512 2002 0.205552828360089 2003 0.388733097796932 2004 0.292409031788746 2005 0.345173611414446 2006 0.193175812294926 2007 0.155450439934669 2008 0.182671461157239 2009 0.116317204104687 2010 0.108975029413952 2011 0.143424766442677 2012 0.130105358248411 2013 0.110437873003737 2014 0.099561569009553 2015 0.0409780341464866 2016 0.0204652117157031 2017 0.0277796234542378 2018 0.0347328226740541 2019 0.0303108940592379 2020 0.0156199754640174 2021 0.0292949219912809