Year	% of GDP
1972	4.6333515572405
1973	4.732933491021824
1974	3.796447851134467
1975	4.505449492718807
1976	4.56956761049984
1977	4.5033811175870975
1978	4.225878452423241
1979	3.871192492080838
1980	3.604090797976704
1981	4.0954271960287105
1982	3.212097963747983
1983	3.6627432115294276
1984	3.8305342898396564
1985	3.5360053114164223
1986	2.877589861709686
1987	2.749624505429878
1988	2.5658199138417084
1989	3.0322386528180907
1990	2.511504439013661
1995	3.3213844798462073
1996	3.3609402433656537
1997	3.541036202910789
1998	4.634266039314511
1999	5.518402118301028
2000	4.676196374930445
2001	4.799143050719308
2002	4.932070426392967
2003	5.82264645927563
2004	5.259766491765793
2005	3.925371032634875
2006	3.8221518721466285
2007	4.0701418446796485
2008	4.638613954876472
2009	4.100883485059357
2010	2.8203133773741262
2011	2.0471381043731345
2012	1.9832186998243282
2013	4.094852482466793
2014	3.3379227702619474
2015	3.8385460363261514
2016	2.95998417735157