Year % of GDP 1991 13.043333996947377 1992 10.316751320860664 1993 8.048115903502358 1994 7.287167340114253 1995 6.647429731751629 1996 6.511701122888026 1997 6.668276944842222 1998 7.304841623953686 1999 7.334505427304694 2000 7.447258548069673 2001 6.004137030047903 2002 5.280310705842621 2003 4.644201551090752 2004 3.703356679393783 2005 3.122722373351127 2006 2.865209135059741 2007 2.0859624378294117 2008 1.4219723788684704 2009 0.9845500484442717 2010 0.5513347522312243 2011 0.45661018555500643 2012 0.4616320853135505 2013 0.39685334641605485 2014 0.4154922511379288 2015 0.570740711910772 2016 0.5952645250094355 2017 0.572479913744711 2018 0.5395857041211869 2019 0.5365096504251585 2020 0.8307362535869334 2021 0.8272629736292281 2022 0.9578689696066656