Year	% of total merchandise exports
1970	6.25
1971	5.555555555555555
1972	8
1974	3.273604410751206
1975	15.273023634881824
1976	16.385451818522682
1977	10.218311612849671
1978	44.421140939597315
1979	32.15351812366738
1980	11.362611597078185
1981	7.8830260648442465
1982	6.032218281874795
1983	4.606402925623302
1984	1.4003928064728008
1985	17.723425771994116
1986	1.9932924760999555
1987	3.1568400312723446
1988	1.9203012817353717
1989	6.990558393491762
1990	4.07929658420082
1991	7.142059195994409
1992	18.128840961275554
1993	15.64115999304487
1994	1.808204151758931
1995	1.2922041500350412
1996	2.4751700785238784
1997	1.5999394609821749
1998	3.417509056116767
1999	1.6038610072236725
2000	3.503669739461046
2001	2.5674672313510007
2002	4.5467763320179415
2003	18.50403204506001
2004	24.116130902720666
2005	36.230841586759475
2006	51.89774389885201
2007	8.715337626128443
2008	11.982234102099234
2009	16.464893592802518
2010	8.084589573569216
2011	11.502193485298685
2012	3.5926014671172757
2013	38.138178651945864
2014	10.590380088572147
2015	16.21343088567532
2016	8.434536676588714
2017	9.426072382248583
2018	14.389487328971109
2019	13.902660129471519
2020	27.018701726452026