Year	% of GDP
1975	14.652524707290075
1976	14.034538313456565
1977	14.50137031122006
1978	14.991989787368418
1979	9.358882627598064
1980	8.39230787190912
1981	12.99850719066154
1982	13.349100825822955
1983	16.530629523714907
1984	20.485443601995584
1985	29.75170674400535
1986	33.51042320660907
1987	30.931090178492646
1988	32.29968264099527
1989	40.86424007396481
1990	31.23145971045322
1991	34.46273013901554
1992	29.074513306909402
1993	39.41454132363105
1994	40.19839866556043
1995	40.52952097477876
1996	48.591269067357224
1997	63.191689153057084
1998	61.52158654533874
1999	94.41529334803913
2000	95.64984234626651
2001	76.37340974330208
2002	59.05955911329461
2003	66.8788304558916
2004	68.57568891437735
2005	71.94687499174479
2006	89.13696264205893
2007	88.92102059199313
2008	41.32324971685151
2009	63.80248874344547
2010	63.27509168672778
2011	50.781590488747405
2012	60.99790708243644
2013	68.86549774190655
2014	60.39889249503687
2015	62.255494743285645
2016	63.247003203811445
2017	74.00012950199837
2018	53.6609855724478