Year % of GDP 1990 2.93362908414046 1991 2.87466511018547 1992 2.01112441965847 1993 1.13793527313208 1994 0.765798258775298 1995 1.096277531173 1996 0.877093606571069 1997 0.636442221249353 1998 0.545506070842269 1999 0.283928508306016 2000 0.763275560850573 2001 1.69987911925213 2002 0.838526701281602 2003 0.737882921244197 2004 2.86683924781304 2005 1.88738405653817 2006 1.56920831525736 2007 1.50666818196351 2008 4.76760578272819 2009 1.774081648721 2010 2.44766697370492 2011 2.47402353369514 2012 1.16307150777107 2013 0.539678974748581 2014 0.517573287575169 2015 0.427727747530492 2016 0.687792012117953 2017 0.837979080702583 2018 0.93298984923782 2019 0.65685203992523 2020 0.570036728063378 2021 0.848889916850088