Year	% of GDP
1970	2.00283002853394
1971	1.87940001487732
1977	2.41883993148804
1984	4.20342016220093
1985	5.23334980010986
1986	6.87237977981567
1995	1.99764001369476
1998	2.19536995887756
1999	1.54734003543854
2000	1.15093004703522
2009	4.34242010116577
2010	4.50743007659912
2011	4.72689008712769
2012	4.64307022094727
2013	5.00464010238647
2014	5.26099014282227
2015	4.99870014190674
2016	4.36299991607666
2017	4.61399984359741
2018	4.62099981307983
2019	4.22565984725952
2020	4.11401987075806
2021	3.6913800239563
2022	3.64703989028931