Year	% of GDP
1981	89.3861261538298
1982	85.9414011504698
1983	75.7565120584181
1984	58.9562879133875
1985	46.3954469802338
1986	54.9482703781155
1987	50.0498878731449
1988	43.7547731391064
1989	52.4874448729933
1990	53.1221935288351
1991	48.4001821644715
1992	43.7743943900069
1993	44.4763640845064
1994	42.0678362091036
1995	37.2059326740728
1996	36.5816700475792
1997	38.4222612730955
1998	40.5534014771735
1999	38.278001003087
2000	34.0492849657349
2001	30.0379434196143
2002	26.7686560732736
2003	28.370895816234
2004	26.0632544189063
2005	24.9661248923538
2006	26.1664998983409
2007	20.1800367936726
2008	18.8597672113715
2009	21.1154546102351
2010	16.815013223412
2011	15.6763106686482
2012	14.2111200784803
2013	14.1687262132837
2014	15.0835333560993
2015	14.8271754314458
2016	14.7249552213428
2017	14.7156166399294