Year	% of total merchandise exports
1960	24.489795918367346
1961	25.423728813559322
1962	18.248175182481752
1963	17.647058823529413
1964	16.33663366336634
1965	13.084112149532709
1966	25.60553633217993
1967	19.169329073482427
1968	24.358974358974358
1969	27.994227994227995
1970	32.951877934272304
1971	29.33832709113608
1972	31.15546218487395
1973	33.664747950462235
1974	30.80785029666819
1975	27.503276539973786
1976	36.74908248020089
1977	36.874623871614844
1978	37.78094172683819
1979	32.88957714114444
1980	23.53963426675619
1981	6.050407736829453
1982	39.31573906565926
1983	35.14460511679644
1984	18.68149256307719
1985	15.81732479544646
1986	23.44841446467646
1987	30.45073604375701
1988	20.905223119755316
1989	29.43791955396119
1990	3.5985202576191755
1991	25.91429045231426
1992	21.078861253414495
1993	20.569805095716013
1994	19.623417910308156
1995	14.907654983714885
1996	10.156044081705867
1997	0.7982897315772208
1998	3.9641182649972704
1999	2.939496631774131
2000	2.4097829590793363
2001	13.727166264576635
2002	8.953775111035716
2003	10.197790251120175
2004	5.223613953587724
2005	8.696657012959484
2006	8.27027640644291
2007	10.23708126504665
2008	2.0843027756429806
2009	1.3226923575893734
2010	1.4745154162106133
2011	1.6749993558392011
2012	12.077965545865439
2013	3.382422650045098
2014	2.9068049142626418
2015	3.1094445932812604
2016	4.239815834526186
2017	5.125414046046359
2018	4.202902687140767
2019	4.694934332789799
2020	5.332719171435634