Year	% of GDP
1990	18.9940504964513
1991	2.39373398719565
1992	15.9219767684209
1993	23.7029113195169
1994	24.9443904464404
1995	23.7585708030374
1996	25.6320693820865
1997	25.1226816205813
1998	21.5935707030295
1999	30.5058253493991
2000	35.0881492394896
2001	31.0984252506825
2002	24.5140398210359
2003	24.9347647819419
2004	23.9391522052378
2005	26.6195374246914
2006	28.8183107095108
2007	28.5937921289563
2008	30.9836648001387
2009	15.890481003589
2010	22.5587517810734
2011	26.74399957419
2012	23.2462256923725
2013	19.7260121949309
2014	19.7077753910396
2015	15.2994593748556
2016	12.5250293693394
2017	15.9723941815837