Year	% of GDP
1970	3.1113034708349647
1971	2.9317657352914974
1972	3.524123599301442
1973	5.785374297549076
1974	13.269446439046636
1975	9.558564201961104
1976	10.053033456118229
1977	12.221478091440108
1978	9.935659535904886
1979	18.976724703747912
1980	12.681810027460678
1981	5.08797636918921
1982	4.433624527973857
1983	5.42103811275606
1984	6.093853441678034
1985	6.15746571584308
1986	4.693475852724913
1987	5.786600641849935
1988	5.811693846230634
1989	8.170730625216782
1990	9.824175743689155
1991	7.308672690456161
1992	8.711047756820397
1993	10.77498433980826
1994	12.226409210374207
1995	12.581004762577582
1996	12.17754276071687
1997	10.81775281303383
1998	7.674261221126079
1999	5.848404967326105
2000	8.59294729258474
2001	7.56884511255006
2002	7.356813738528892
2003	8.527822007758974
2004	8.770603020302035
2005	10.272614485606903
2006	10.432998211052041
2007	10.227387571427865
2008	11.877293088098615
2009	7.938487020872121
2010	9.285277740162293
2011	11.71523074017003
2012	9.716926653368496
2013	8.108546979777485
2014	6.970881391982828
2015	4.829965445594648
2016	4.661992425924961
2017	5.533386297075742
2018	5.579574799286044
2019	4.894344629354412
2020	4.105558018569829
2021	6.821859524827067