Year	% of total merchandise exports
1960	2.247191011235955
1961	3.2653061224489797
1962	2.782608695652174
1963	2.6101141924959217
1964	2.6223776223776225
1965	4.671532846715328
1966	3.8363171355498724
1967	4.2682926829268295
1968	3.644646924829157
1969	4.76259319688552
1970	5.852021300532513
1971	6.748397255651782
1972	6.857608395058038
1973	8.260050251256281
1974	16.86743184716593
1975	28.488000851380836
1976	46.768595335026006
1977	43.84209298874213
1978	46.3828113072379
1979	43.16072575997456
1980	47.45425841358834
1981	48.69761288303411
1982	48.79527482362367
1983	45.55982254786459
1984	48.470500704713636
1985	46.20819179308128
1986	37.1419923497734
1987	36.10712012520534
1988	32.80278620618707
1989	26.7255806463367
1990	24.18475043659007
1991	31.77034716374155
1992	31.2870690755766
1993	30.006962684896326
1994	23.646585425550796
1995	18.740473842785665
1996	17.03797120603677
1997	20.577429716572244
1998	22.380137066195964
1999	20.735279331345826
2000	19.880298677567644
2001	18.411334554757943
2002	20.94539800988876
2003	17.430115204065448
2004	14.37217197906958
2005	8.872782368193652
2006	11.56728567662528
2007	9.306835219294966
2008	10.349040452796743
2009	12.911658610183876
2010	11.437680503430013
2011	8.610991568670643
2012	12.20275788737062
2013	10.441156736738774
2014	7.035470243329726
2015	9.782370302826495
2016	12.358304951712851
2017	16.87400135542072
2018	19.332781967421194
2019	16.515389099179632
2020	13.425656273387956