Year % of GDP 1999 4.11037015914917 2000 3.9050999879837054 2001 4.10587978363037 2002 3.520090103149415 2006 4.209100008010865 2007 3.6185849905014047 2008 4.125389933586121 2009 4.42207002639771 2010 4.02741503715515 2011 4.078315019607545 2012 4.404124975204464 2013 4.421679973602295 2014 4.08329010009766 2015 4.02387511730194 2016 4.001705050468445 2017 3.93130993843079 2018 3.80771505832672 2019 3.49000000953674 2020 4.10250997543335 2021 3.91850006580353 2022 3.69249999523163