Year	% of GDP
1997	33.28886806104428
1998	50.79133933077434
1999	53.46162538233532
2000	51.161916715341796
2001	38.10546459350035
2002	31.78542990295316
2003	35.2757302592295
2004	37.08923474974193
2005	33.95289416805113
2006	49.908551501720694
2007	54.98572075896331
2008	26.147203213487014
2009	40.15535142896541
2010	34.43604460343826
2011	25.16742648674319
2012	30.301431432882186
2013	34.967341323134626
2014	25.129924485656264
2015	30.009513844969675
2016	27.736419666079538
2017	34.14815438918515
2018	25.55932824935756