Year	% of GDP
1974	3.046188836023117
1975	4.315097164263444
1976	3.501732994016684
1977	5.970765080591384
1978	2.2747571435059046
1979	5.2629372826049545
1980	6.147030926430719
1981	4.781927846020668
1982	7.49447734196203
1983	4.369109438629981
1984	6.9444882316971075
1985	7.822203910308298
1986	8.726328335784183
1987	7.6594925478003
1988	7.605259695993674
1989	7.337575027735403
1990	7.66729884900916
1991	5.604975305933168
1992	5.1397898712167605
1993	6.975981878939623
1994	5.5373468614172925
1995	5.215656524278498
1996	4.869439478926983
1997	4.835640180411975
1998	5.243561250416434
1999	5.329201948713637
2000	5.484418497584601
2001	5.945023515716829
2002	4.905401946389115
2003	2.942613897752807
2004	4.954177145664167
2005	4.238812253446907
2006	2.6164038339285693
2007	2.4349349821473463
2008	4.640831522900954
2009	6.0139158949504745
2010	4.326456625889583
2011	5.444546100342967
2012	4.693277611421269
2013	4.460959506907391
2014	3.776737123873027
2015	3.777963421987889
2016	3.2206963532916366
2017	3.4628083440846678
2018	3.2452754019025893