Year	% of total merchandise exports
1963	0.45662100456621
1964	0.2691790040376851
1965	5.638665132336018
1966	10.064935064935066
1967	16.07795371498173
1970	11.316763617133791
1982	0.09288500834346014
1983	0.36847150999142225
1984	0.9421956554654486
1985	0.018878348122563383
1986	0.016725939710625883
1988	0.1807217911543945
1990	0.13101209266741476
1991	0.2074343118162022
1992	0.046814424852596896
1993	0.07083498130652226
1994	0.06708551072135506
1995	0.021482002777595703
1996	0.02192553214274271
1997	0.028762263909750403
1998	0.025709694697375468
1999	0.11826240793800358
2000	0.02046813956000411
2001	0.015999757470159866
2002	0.02311946441033941
2003	0.02351052141573207
2004	0.05057438970196402
2005	0.03281921367364029
2006	0.051708126643362926
2007	0.15257102579356327
2008	0.179061737505836
2009	0.0902361453143485
2010	0.11925331860284376
2011	0.1501228428084355
2012	0.3536309067303573
2013	0.7097942433640589
2014	0.3128966421585636
2015	0.3796480685946817
2016	0.241318394287081
2017	0.40496888001454673
2018	0.43840723931573705
2019	0.4593770791278475
2020	0.4801057540079789