Year	% of GDP
1990	29.6537087765185
1991	17.51407957206
1992	15.5652872176938
1993	21.4011786236035
1994	38.2666711217599
1995	41.7176003614101
1996	37.8379037426715
1997	30.7271756726449
1998	22.2124754813418
1999	29.5195083318193
2000	42.1825685912055
2001	33.9682836619205
2002	31.7804662399612
2003	32.997954751508
2004	34.9371257803732
2005	42.2991664652412
2006	41.5225717250662
2007	33.3550316048163
2008	33.8911568507155
2009	20.2371784167553
2010	22.1394149247039
2011	23.4171236380596
2012	16.9784767633945
2013	11.0549414721125
2014	8.92234877219389
2015	1.67262798901198
2016	0.681565886623517
2017	1.76928691879908
2018	4.53131065171137