Year % of GDP 1998 37.063982282259566 1999 47.43738583029551 2000 53.94445171415101 2001 53.36995840715731 2002 47.47811516361055 2003 45.67213180834541 2004 44.10518805493121 2005 38.61380133576138 2006 36.609798279585725 2007 34.991491585183766 2008 34.03770555278079 2009 42.044365067080584 2010 45.56012091451186 2011 48.580537728844206 2012 58.4877522932784 2013 63.210771275551444 2014 65.88108649593572 2015 64.8344855345917 2016 66.41586188488536 2017 64.35388113295593 2018 63.783480183904494 2019 63.11211148810395 2020 78.32609648013053 2021 78.84190149515065 2022 64.50713214839034