Year	% of GDP
1971	4.38723993301392
1972	3.90638995170593
1973	3.2627899646759
1974	3.67424011230469
1975	5.64942979812622
1976	6.06396007537842
1977	5.40031003952026
1978	5.95213985443115
1979	6.14172983169556
1980	5.46931982040405
1983	5.55226993560791
1984	5.55166006088257
1985	5.65072011947632
1986	5.18592977523804
1987	6.11773014068604
1988	6.15111017227173
1990	5.73963022232056
1992	6.84061002731323
2005	10.6785898208618
2007	9.04666996002197
2009	9.8253002166748
2012	9.25800037384033
2013	8.01700019836426
2014	8.22299957275391
2015	8.39500045776367
2016	8.73600006103516
2017	7.80900001525879
2018	7.90500020980835
2019	8.39900016784668
2020	8.05799961090088