Year	% of GDP
1977	17.3875658481903
1978	21.568784038324
1979	19.4945010677635
1980	21.3739266066693
1981	18.2238387897257
1982	22.7730888165808
1983	28.1688294237424
1984	25.1207066455
1985	25.359383158203
1986	21.3341513785567
1987	19.5279018126877
1988	23.1607153765682
1989	17.2969034257288
1990	22.0053445038277
1991	20.6380096253808
1992	23.8702667225847
1993	27.5952157347791
1994	28.4408827591712
1995	10.1448654715944
1996	10.4815656611382
1997	10.6138921557896
1998	10.329140346541
1999	10.089978402884
2000	8.85401266054351
2001	5.88249703212891
2002	5.30905396808106
2003	7.98340735798638
2004	7.74651534915202
2005	13.842455821379
2006	14.6552088796136
2007	9.27598908331792
2008	10.8662905798777
2009	23.6163072900527
2010	21.657399312953
2011	19.6576401129152
2012	21.9013227890672
2013	22.4533969109916
2014	16.3045457165409
2015	17.37401864953
2016	9.9837203186184