Year	% of total merchandise exports
1961	15.267175572519085
1962	18.53281853281853
1963	14.545454545454545
1964	19.83695652173913
1965	21.755027422303474
1966	7.850467289719626
1967	5.980066445182724
1971	8.14479143917886
1972	11.946308724832216
1973	16.922043010752688
1974	12.530917543284561
1975	15.002904323292674
1976	15.069716034687977
1977	30.570464652660633
1978	18.954756295990478
1979	9.38089302266117
1980	15.759037465398634
1981	16.136935955897368
1982	17.00440018527096
1983	9.573813708260106
1984	11.333645758823966
1985	12.47917554531014
1986	16.847154910983836
1987	3.401159227289795
1988	0.7774303342206973
1989	0.684098365398272
1990	0.12871748092937813
1991	0.3518559908842288
1992	4.14435828342139
1993	31.603346556770017
1994	0.686977143553215
1995	8.581066062068059E-05
1996	38.60977748033284
1997	8.514127666593186
1998	10.135848786554906
1999	1.891416139226966
2000	1.5641884042021466
2001	0.8417212970210407
2002	4.591734167014532
2003	3.348327155799617
2004	3.3845867847162037
2005	1.083972672897435
2006	22.949379688477688
2007	43.4445463586365
2008	1.365038385815266
2009	38.96194326150949
2010	10.063767754920125
2011	41.05346825892968
2012	57.755703441607864
2013	40.17376768820773
2014	28.59716931174964
2015	0.8373309979642458
2016	25.504769172733212
2017	42.0586962822143
2018	85.34544836950872
2019	66.62570969512022
2020	44.551054887247446