Year	% of total merchandise exports
1960	2.1671826625387
1961	2.96220633299285
1963	2.803738317757009
1964	1.04
1965	1.6033755274261603
1966	4.2682926829268295
1967	3.971405877680699
1968	2.564102564102564
1969	1.4168319637291018
1970	0.9225171972760897
1971	0.4238674486402547
1972	0.9228545807541289
1973	1.5551099376707813
1974	0.8392962936507603
1975	0.9266081675486192
1976	1.788427295652191
1977	1.2807849475699151
1978	0.40211804741406876
1979	0.7171273170684259
1980	0.5349956109969473
1981	0.5600993017620315
1982	0.48377512659582766
1983	0.8115462114553628
1984	0.18210480539247664
1985	0.5369037682458339
1986	1.637973562709506
1987	1.1743433998410941
1988	0.8984729780106991
1989	3.46335852366549
1990	2.6070118626914898
1991	4.268533910684423
1992	3.4865293176912955
1993	4.932176380391701
1994	4.261035097216585
1995	5.108575725159669
1996	5.938857583247781
1997	8.875816917648
1998	6.063944281987305
1999	8.34151875318318
2000	9.410621531135043
2001	10.16847157361727
2002	9.658887853091022
2003	8.778580543237632
2004	10.09845489123932
2005	8.082466241428914
2006	6.794357968645888
2007	9.8760130761291
2008	14.770632262240008
2009	15.96859668481322
2010	15.59350419576934
2011	19.773259863181732
2012	21.570880706246072
2013	16.556461437900573
2014	30.161544863705014
2015	35.962602135046126
2016	24.410471610994612
2017	30.64228372921075
2018	38.842722165901336
2019	36.56263134981981
2020	35.53004885916969