Year	% of GDP
1977	0.38753826710891937
1978	0.16185146597324057
1980	0.00475059412587622
1981	0.0015889831077644538
1982	0.004880030071809638
1983	0.003187247034841576
1984	0.003316284323313682
1985	0.0024640298472517856
1986	0.0019129500646711142
1987	0.0018007264744159008
1988	0.001722255037619571
1989	0.0017783016787373722
1990	0.0056085964879164655
1991	0.010294234509901556
1992	0.010648975754093267
1993	0.012427403292273901
2005	0
2006	0
2007	0
2008	0
2009	0
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	0
2021	0
2022	0
2023	0