Year	% of GDP
1986	41.4086771173212
1987	29.8118953784616
1988	24.6465385414698
1989	29.3038382451664
1990	77.4750573420878
1991	13.3721607315948
1992	10.4125699595301
1993	10.4110423933788
1994	9.36005930423068
1995	3.0738844225808
1996	3.11717258830366
1997	7.29362978085425
1998	10.8147783251232
1999	13.7157387129893
2000	10.5511563051356
2001	6.16871653818104
2002	6.8043872784107
2003	6.75086869720009
2004	5.63494548650837
2005	7.16476599577615
2006	6.41979121934662
2007	6.2295351868533
2008	7.75920188870756
2009	6.34731297573559
2010	10.1750131881192
2011	12.0487138475462
2012	21.1906875707546
2013	18.2563635433919
2014	22.7010867209397
2015	24.3569932734535
2016	23.9833326200422
2017	20.9176464856374
2018	23.6999811231754