Year % of GDP 1994 0.0174651080042245 1995 0.0679731123399078 1996 0.0383334772307156 1997 0.039185224023228 1998 0.085860424257097 1999 0.0147906862857682 2000 0.138280003033367 2001 0.448961430454632 2002 0.141291322347015 2003 0.129088331018867 2004 1.02502375676112 2005 0.613757035471359 2006 0.617839638487773 2007 0.816076787678695 2008 2.37666975759293 2009 0.77289496372878 2010 1.41865020328922 2011 1.85949087082502 2012 0.832298329684597 2013 0.389629817927477 2014 0.258107281929994 2015 0.196643861612622 2016 0.235805940272804 2017 0.302151206386166 2018 0.322899368848151 2019 0.219668427336333 2020 0.184004951800987 2021 0.301983937935592