Year	% of GDP
1990	14.386293897033752
1991	14.585362576831356
1992	14.523456261376325
1993	15.19785435448086
1994	15.246006550136148
2000	16.528344352229567
2001	15.730337078651685
2002	21.025038339716865
2003	21.503968817560636
2004	21.254758408043077
2005	20.661813327016144
2006	20.850042243321532
2007	21.6321300112301
2008	20.036635801331443
2009	18.868962404116758
2010	16.311766426322446
2011	18.075171712773262
2012	17.904545183147636
2013	17.83305704845442
2014	18.473178511689422
2015	19.63513252079706
2016	18.354111410714353
2017	17.41267905698988
2020	15.042382646369926