Year	% of GDP
1975	28.480108688288396
1976	27.97053269216604
1977	33.537736174881886
1978	34.567825791298695
1979	35.003195695518805
1980	35.07671890830355
1981	34.44448384151764
1982	35.017442404296446
1983	34.593670787800875
1984	33.66325283278332
1985	35.65545041820318
1986	28.533667314455506
1987	26.675370205980165
1988	31.44642436810889
1989	31.411564405223054
1990	15.284873706189769
1991	13.745983854410678
1992	14.513146269800714
1993	13.208673285620481
1994	15.144795086202922
1995	9.073412724764522
1996	10.60444271576566
1997	9.784454213910449
1998	12.426012557072891
1999	11.269949130234124
2000	10.651946805033502
2001	8.493278687182846
2002	9.521740625301787
2003	11.846799034117463
2004	8.124926456358748
2005	3.8322964135184314
2006	8.084107936914442
2007	13.461148073050758
2008	8.051155128723417
2009	7.137611633894133
2010	6.506270579617249
2011	1.9477909063741223
2012	4.260048759119853
2013	5.018293231319914
2014	4.366251865056896
2015	4.898158661851195
2016	2.6500090574968675
2017	4.9583272968550505