Year	% of GDP
1973	3.098360782719704
1974	2.172245353613388
1975	2.768618486038343
1976	2.31129795363611
1977	2.4947649026812737
1978	0.9882787231650125
1979	2.2636996890352514
1980	3.701268649694485
1989	3.1521045634386824
2014	2.362704559362923
2015	4.492512705778801
2016	5.114393322149451
2017	5.055047380707501
2018	5.230375115260781
2019	6.337046841965383
2020	13.31773319349907