Year % of GDP 1990 17.763157894736842 1991 16.80785123966942 1992 14.721102692245688 1993 15.204634197290826 1994 14.703246753246754 1995 19.734620971224434 1996 19.097918563738933 1997 19.939588987187154 1998 21.16539053776653 1999 18.727114766178296 2000 21.880102635875904 2001 17.355473408533516 2002 20.83022341161957 2003 17.929317364734604 2004 21.045921092931984 2005 19.845548830106953 2006 21.40813522876598 2007 23.712686617197072 2008 27.932705054351757 2009 25.742483515105324 2010 24.468094837364166 2011 26.91313395923186 2012 28.92717638412438 2013 28.808047962605425 2014 30.295225261593806 2015 30.403575249483854 2016 32.509688211904944 2017 32.27294347571452 2018 32.32881106649034 2019 34.26011609928351 2020 29.917373894334208 2021 32.22079800396192 2022 36.02256639867719 2023 23.85526718065788