Year % of GDP 1999 3.8775951840111613 2000 3.84451009725314 2001 5.968231533965144 2002 7.151015822291034 2003 4.52233112806554 2004 3.911240657032702 2005 3.483069258526492 2006 4.119207382933753 2007 3.7939040455152764 2008 5.010393033850996 2009 3.108497943828958 2010 2.889725099861595 2011 2.928529912386795 2012 3.344565308500983 2013 3.253117042954918 2014 2.7216990595129893 2015 2.785538711784099 2016 3.924294175095527 2017 3.7917038905646026 2018 4.063695094251493 2019 4.029937796825562 2020 2.8241811185025 2021 2.8502802883139906 2022 2.7441388823597865 2023 2.6280952861370563