Year	% of GDP
1977	0.17439472395244845
1978	0
1979	0
1980	0
1981	5.846002211304513
1982	0.22339485491118513
1983	0.2027057333969074
1984	2.1070554425766304
1985	2.510629735088362
1986	3.836275563049613
1987	8.901448206361467
1988	6.969897663525132
1989	9.288404656504715
1990	6.398705549222232
1991	6.926654981798561
1992	8.720488638521422
1993	5.376214324503711
1994	8.548493296535494
1995	19.70426734663591
1996	6.089942597919333
1997	6.9688412971995
1998	2.0195058069407588
1999	5.4122243929668015
2000	5.257126837439399
2001	4.301577398098409
2002	6.0190879675990345
2003	9.129445924258034
2004	7.019580622804357
2005	5.191578804989123
2006	6.70771962224724
2007	9.585005612776902
2008	12.268876204649628
2009	11.607663373608561
2010	11.568007356386794
2011	10.073033315803864
2012	11.588434010344928
2013	7.762618285574482
2014	2.3724494412422388
2015	1.3241882871800494
2016	7.334736697657823
2017	4.348025534421939
2018	14.110914390853543
2019	10.308417130516606
2020	4.5292473225577465
2021	5.103622606835101
2022	2.907601702475853