Year	% of GDP
1974	14.8285077951002
1975	16.7542213883677
1976	14.0189873417722
1977	12.3059757942511
1978	17.3760972316003
1979	16.1314499855866
1980	15.805832602876
1981	21.0712717109203
1982	20.7274284735309
1983	22.1564570874414
1984	19.6419465387252
1985	18.4571962616822
1986	18.5289876254507
1987	15.37038594131
1988	14.5494184198818
1989	11.1867266010107
1990	10.430602045102
1991	10.0455608628958
1992	14.9736366106735
1993	14.6542957361842
1994	16.8685493244421
1995	11.1944912445505
1996	12.1522102140893
1997	12.3870350811875
1998	10.4528998807011
1999	11.1404914981812
2000	9.75369713212546
2001	9.52770142651804
2002	12.7740013421488
2003	14.0422014527089
2004	15.7083423188417
2005	14.0149783223802
2006	12.0277668865181
2007	5.6863209691557
2008	1.66730591077037
2009	7.49255717324297
2010	14.3628872592891
2011	21.885143612701
2012	16.3438967412935
2013	15.3317384581284
2014	16.6453701495278
2015	16.9376314205255
2016	21.7451992648253
2017	23.9562718259274
2018	27.7877513418631