Year	% of GDP
1981	51.7159842561075
1982	51.3249902627268
1983	49.13460809873
1984	41.3378114822191
1985	34.7293504049622
1986	35.5467081711202
1987	36.2302087368218
1988	32.7860717184377
1989	39.7689744818113
1990	38.4591598511473
1991	38.4919444442656
1992	34.4874531045285
1993	32.8875023808318
1994	31.7488578992643
1995	30.3301730246263
1996	27.1968017368997
1997	28.4660254628519
1998	25.3671597802627
1999	31.2582691916074
2000	33.6993149503498
2001	26.2363230599548
2002	25.0713742812001
2003	25.452242656057
2004	26.9369549599184
2005	29.2802070174801
2006	34.5099360412407
2007	23.6430290919079
2008	24.4472475560278
2009	21.6007840830447
2010	22.037617974628
2011	21.9237616116404
2012	24.7490490236495
2013	18.6080745843396
2014	20.5494186860012
2015	18.0982620105082
2016	18.4030587187988
2017	19.2902234158323