Year	% of GDP
1960	20.9597475200578
1961	22.0967699167542
1962	12.5980360661773
1963	22.2748779800549
1964	21.3626324327991
1965	17.1399141687419
1966	17.9889298892989
1967	20.3938391085341
1968	21.1784565916399
1969	20.8969642362637
1970	20.0921052631579
1971	18.2119442349681
1972	19.0695652173913
1973	19.3476821192053
1974	19.4520936834634
1975	24.0790754257908
1976	27.287853577371
1977	30.2410682396275
1978	31.4302995365113
1979	26.8370380128128
1980	22.307863508137
1981	18.7854634340794
1982	21.8628804494003
1983	22.0062881333346
1984	20.9901106362239
1985	22.6932764540765
1986	33.9974695978873
1987	28.8204400919883
1988	30.8834597875569
1989	30.3082773265473
1990	29.1417322834646
1991	29.8703005073501
1992	30.6178516228748
1993	21.1353769240889
1994	16.896046255955
1995	17.3296724105283
1996	15.2641378779718
1997	16.7294386663716
1998	21.9742631075559
1999	19.0411233009039
2000	8.65090512540894
2001	13.3428208758483
2002	11.8347189890256
2003	12.9657938773501
2004	11.3422509976382
2005	1.10368455476999
2006	-8.27902834809281
2007	-6.85080197251793
2008	-15.2459968217102
2009	-14.3611489519611
2010	-14.3415914677546
2011	-16.1342920586371
2012	-8.93305326084061
2013	-7.2359804764323
2014	0.814504465201558
2015	21.5253187590079
2016	33.6919772794967
2017	36.3083316880553
2018	28.7881973350379