Year	% of GDP
1963	11.5797591928521
1964	12.6615565718032
1965	12.2294129971684
1966	12.0739853710631
1967	8.32857867720864
1968	5.56973643124014
1969	4.34567787710629
1970	5.79260274869282
1971	6.7244790673583
1972	7.96358232683489
1973	8.14431186595179
1974	11.5644153414721
1975	14.8375182789607
1976	15.5647433593947
1977	16.0082042033064
1978	18.1528128806508
1979	11.716718049566
1980	9.23882696863948
1981	9.69553084268709
1982	12.7921012785434
1983	13.4493758050389
1984	6.27744325358395
1985	5.55439393918484
1986	7.35494286349961
1987	6.68056537131941
1988	9.9377918996108
1989	11.2059537294933
1990	25.3337156547491
1991	17.0614266666667
1992	14.2735729566855
1993	16.4004457652303
1994	3.42931097244264
1995	1.69843333540184
2000	1.83188043953467
2001	1.18374264863367
2002	0.209830786857084
2003	1.16063852343982
2004	0.82364241766408
2005	1.72854006849365
2006	2.86457926293174
2007	3.56044037389893
2008	5.88525816916523
2009	5.11507163598908
2010	0.79976548863035
2011	7.90456051715099
2012	6.53009450969751
2013	7.27693634186406
2014	7.91369410621932
2015	8.99479279395752
2016	11.604752427357
2017	8.31551503888851
2018	8.37616091721043