Year	% of GDP
1988	17.162642710087965
1989	20.12216404886562
1990	20.785470350822727
1991	16.510547014658563
1992	13.85744345081536
1993	20.03918179697977
1994	19.099467867376177
1995	19.075658682494307
1996	19.49372980744189
1997	21.067109951103813
1998	18.732723283907998
1999	14.579430997897989
2000	15.09106730228645
2001	16.435248586740812
2002	17.934536724989613
2003	17.916097182973704
2004	16.971677969433415
2005	16.87153894314989
2006	17.38813755113128
2007	17.297534285913795
2008	17.830576085536045
2009	20.786596659613863
2010	18.725055415635737
2011	17.625511528096617
2012	17.96723805272571
2013	18.675302148229036
2014	18.027331393141846
2015	17.765389216656196
2016	18.465919377313377
2017	18.216808647782308
2018	17.71037832040107
2019	18.101366411120328
2020	19.971000788607636
2021	17.1189178643982
2022	17.1770682334463
2023	18.47308268464417