Year	% of GDP
1972	3.1822898650985816
1973	2.5274725274725274
1974	3.227107704719645
1975	3.2578343158547933
1976	4.652575315840622
1977	5.793808577108775
1978	4.665275934003414
1979	3.2360246211439474
1980	2.886858104232784
1981	3.561574484242501
1983	3.278488112873765
1984	3.036309331684631
1985	2.844809163567979
1986	2.4974891981683385
1987	2.573007378024381
1988	2.066945509558946
1989	2.0265796953158026
1990	1.7638519493960467
1991	1.6838462831261947
1992	1.6611973278896033
1993	1.697641582525892
1994	1.238099465232541
1995	1.1539904232115399
1996	1.5583352471876362
1997	2.2472590678269913
1998	1.076646374655236
2008	1.9185773059548712
2009	1.8863853109156794
2010	1.8992990683586088
2011	1.759369203854632
2012	1.9787871431883104
2013	1.4765260806967495
2014	1.6374244280252495
2015	2.2448919901543762
2016	4.392464295867458