Year	% of GDP
1977	13.685492655615654
1978	14.18180363233721
1979	10.610246432222976
1980	9.4084430156065
1981	9.034141695329128
1982	7.962251393207648
1983	7.376641401728812
1984	7.0249993766248195
1985	6.310521419810403
1986	5.176078094834257
1987	6.562547593709301
1988	7.891832482606762
1989	7.9859112304573125
1991	13.913872028106427
1993	16.78825554009274
1994	14.809401047753743
1995	12.646418377756582
1996	11.743320157019403
1997	12.05067275389415
1998	11.586752225607185
1999	11.217326490723893
2000	11.387333264929717
2005	19.309873227626543
2006	18.130607391617534
2008	18.243664679286873
2013	13.710438208379713
2014	14.473226665275092
2015	14.792113297273865
2016	13.980593336381837
2018	16.41480830499696
2019	16.425451723560492
2020	10.808429550779882
2021	12.341517511917635
2022	14.10593303415127