Year % of GDP 1998 41.4591970072399 1999 42.55273667773577 2000 44.31459408723731 2001 44.3874110618887 2002 46.6677229903678 2003 47.87130382273618 2004 53.85189149035274 2005 57.07657035947816 2006 61.04603695491198 2007 62.93710379150188 2008 64.99281150664996 2009 58.761554730511655 2010 66.01657675600866 2011 66.62107204496871 2012 66.68049102252499 2013 65.27964633120708 2014 62.062068247546065 2015 57.67849702593851 2016 53.913993036235595 2017 53.28149895021117 2018 53.850075785431194 2019 50.37877639618852 2020 35.33035011445719 2021 38.18002170571815 2022 40.78783356912378 2023 46.63252742751201