Year	% of GDP
1971	36.8688313333557
1972	48.3011524777521
1973	45.9139322887607
1974	35.273140366188
1975	36.9510581679852
1976	36.359791409301
1977	35.5325666696876
1978	39.6187588783934
1979	41.0538082358237
1980	42.6006314302598
1981	48.569342955048
1982	51.6516860850687
1983	57.7256733230444
1984	59.9108723179415
1985	63.6919311467347
1986	78.8638558267903
1987	67.660084478423
1988	68.9971894070358
1989	37.6367821834443
1990	39.5599882586313
1991	44.5834743022574
1992	40.9955183490267
1993	34.4332285100467
1994	32.4107411975402
1995	32.4536941340667
1996	33.6972272027071
1997	30.65915504029
1998	28.1490343998171
1999	26.2346597757405
2000	31.1728706395989
2001	33.1707262635452
2002	28.1711332999731
2003	21.610352993842
2004	24.5515316041976
2005	23.0629617132594
2006	21.3527841716209
2007	20.198419765088
2008	18.4986067937346
2009	21.1614023894839
2010	25.2162513095679
2011	27.6419388483574
2012	22.7190450076728
2013	26.7518134554615
2014	28.9620365454876
2015	33.2924599691923
2016	39.2959511401795
2017	42.5356688601071
2018	43.5134030104616