Year	% of GDP
1972	4.15990596947606
1973	2.790634890630775
1974	2.1855300382101244
1975	2.0659414116806616
1976	2.7466088998412914
1977	3.5876083604750884
1978	3.383449324201757
1979	3.176775886928166
1980	3.4355650744383395
1981	3.600418694394436
1982	3.8359302241307334
1983	3.3864682132434822
1984	3.003430872948749
1985	3.520776070010333
1986	3.1837916874220227
1987	2.5793264973411403
1988	2.039166477808909
1989	1.824994349227293
1990	2.300341914127081
1991	2.857536003661675
1992	3.2129552192838537
1993	4.123764412001376
1994	4.804816363927148
1995	4.857035281085467
1996	5.153274562777939
1997	7.09630576331494
1998	5.90124156847748
1999	4.668645583367746
2000	3.8630562820770757
2001	3.2068805974030687
2002	2.8445958722111047
2003	2.1098189889509813
2004	1.7914505048831784
2005	2.4968986299707225
2006	2.341156881033883
2007	2.032421688086369
2008	1.7389639915981667
2009	2.396038811566855
2010	2.701132173929939
2011	2.0571312601314626
2012	2.0831598168101197
2013	2.021053110428421
2014	1.9959822753672327
2015	2.7218921508147136
2016	1.4783577648280226