Year	% of GDP
1979	2.4953212710364365
1980	5.115408608858391
1981	6.89145223306714
1982	12.219959266802444
1983	12.631837135148395
1984	9.261658031088082
1985	9.991138679663269
1986	10.28976936723832
1987	12.284069097888676
1988	13.570656579302891
1990	13.962319263911201
1991	14.614095298906538
1992	14.958982364077187
1993	13.734537322727657
1994	13.004582151429195
1995	13.596388492578948
1996	13.452178834182229
1997	14.445504438987664
1998	14.200240474394688
1999	14.091570465227582
2000	13.796110041300965
2001	9.826307388977561
2002	9.50792544852813
2003	9.42070183448992
2004	10.489435854297813
2005	11.569373882247252
2006	11.756440710792502
2007	12.147449506222758
2008	11.57888281402977
2009	9.1006679916955
2010	8.847627930305107
2011	12.078133978561185
2014	19.323003278550498
2015	19.650155092686155
2016	19.975825642690303
2017	20.691578885465585
2018	20.144936037928897
2019	19.941384900515256
2020	20.11218858678631
2021	19.446180795213806