Year	% of GDP
1972	1.9469026548672566
1973	2.3154848046309695
1974	2.111111111111111
1975	2.181818181818182
1976	2.3340627279358133
1977	2.4878312601406165
1978	3.080872913992298
1979	3.292046936114733
1980	4.048154815004624
1981	4.205966325595528
1982	3.323102627253581
1983	1.7328971284681556
1984	1.8920356586300646
1985	1.6509822028106418
1986	1.6715714614596664
1987	1.4104410817364106
1988	1.0641410490449377
1989	1.1341747469529941
1990	1.0564753263739504
1991	1.1779640539524916
1992	1.096592248718979
1993	0.8874679881369933
1994	0.9589375019574249
1995	0.6971829709452549
1996	0.6939365711177709
1997	0.7625489626875793
1998	0.5280986279919302
1999	0.4185587480100953
2000	0.37341426445870785
2008	0.4841248375330555
2009	0.6157035614470646
2010	0.6272918909271407
2011	0.7145378728281299
2012	0.667049381759842
2013	0.5666276392637141
2014	0.7091945959434162
2015	0.6246239576857413
2016	0.4927523653322715