Year	% of GDP
1975	12.2522182367378
1976	11.2418300653595
1977	11.0302197802198
1978	10.59073310853
1979	14.2871486408329
1980	12.2575962590787
1981	12.677186174533
1982	12.2979849068722
1983	12.9358464116803
1984	12.3600159517404
1985	12.8517250244228
1986	13.2772527123337
1987	14.7603880448509
1988	13.717949298325
1989	15.7140881389656
1990	16.6493990428524
1991	16.294236607294
1992	19.048923830988
1993	14.3421577887977
1994	15.4964005637665
1995	13.9826091628765
1996	12.9514512799273
1997	12.5987154734984
1998	12.3129196577701
1999	12.1671676566088
2000	11.6174424814019
2001	10.4939934169451
2002	12.38857679867
2003	13.5018562818869
2004	11.2765770777263
2005	10.2821379018842
2006	12.4039684371615
2007	13.9492013418611
2008	11.7182967489297
2009	10.378688447123
2010	9.90985124538877
2011	10.0695131619783
2012	9.25406775204176
2013	9.56399709753653
2014	9.54975266317951
2015	9.6012508299064
2016	9.51888674553635
2017	9.36589303214059