Year	% of GDP
1986	2.19795989990234
1987	2.42225003242493
1988	2.17925000190735
1989	2.18262004852295
1990	2.24734997749329
1995	2.75467991828918
1996	3.69773006439209
1999	3.43224000930786
2000	3.60612988471985
2001	3.09834003448486
2003	2.20964002609253
2010	2.43236994743347
2011	2.85346007347107
2012	2.52900004386902
2013	3.72170996665955
2014	3.32569003105164
2015	3.85398006439209
2016	3.28257989883423
2017	2.76899003982544
2018	3.32295989990234