Year	% of GDP
1972	5.30236634531113
1973	5.019693783871827
1974	4.109077325364214
1975	7.229582756575044
1976	8.902998053883504
1977	7.227508718774164
1978	9.008177261936165
1979	9.47685274813117
1980	10.280400565950133
1981	12.612212412312363
1982	9.192958214131197
1983	8.818468986778402
1984	6.717607759709976
1985	8.27801285462116
1986	9.574249189874973
1987	8.985081347157315
1988	8.95557363298073
1989	7.887504059881077
1990	7.074743401234783
1991	6.928549634161676
1992	8.375643795609204
1993	5.963202879046916
1994	6.199052534445503
1995	4.965742536920197
1996	4.274759279566178
1997	4.184415444551326
1998	4.782927815592619
2002	2.025437671743201
2003	3.404307377044931
2004	2.6285238839072402
2008	1.4686719826837917
2009	1.3510551626089926
2010	1.1661093809500869
2011	1.5019039225836042
2012	1.6763225804691886
2013	1.889319802131418
2014	1.4653701353379929
2015	2.147899940594748
2016	1.2387408156425614