Year	% of total merchandise exports
1961	0.644346178142767
1963	0.16578249336870027
1964	0.14052838673412027
1965	0.3314917127071823
1966	0.45517882025081285
1967	0.579503863359089
1968	0.36097463150506365
1969	0.2883940214665463
1970	0.4053730505354062
1971	1.84290930769804
1972	2.520919097905853
1973	2.231534754137581
1974	3.2276628629682005
1975	2.3432569880099483
1976	1.7830078069146957
1977	1.3090799815939973
1978	0.8992165956547671
1979	1.1095304620417064
1980	1.4808586133929644
1981	1.3951078644843924
1982	1.5373548235435515
1983	1.1565933203735805
1984	1.4165067534369757
1985	1.6100085288069614
1986	2.4144422032374404
1987	1.5109738155027268
1988	1.4183915769849054
1989	2.1286136795425716
1990	2.2522679254309907
1991	2.19915747614487
1992	2.7081345094635627
1993	3.2583306008262847
1994	2.1460815377254536
1995	2.0591672467258806
1996	2.7274365624550394
1997	2.871913921742593
1998	3.4144199950572336
1999	2.243504707761888
2000	2.289543221151192
2001	3.441650454518942
2002	2.7769958217684487
2003	2.5354387934310783
2004	2.2771090112906562
2005	2.460102803132259
2006	2.335648921139754
2007	2.7793853963163433
2008	2.1906871616705086
2009	1.6966919157067581
2010	1.7067870430205454
2011	1.8145033293795136
2012	1.5399415472361142
2013	1.7657998249563343
2014	1.7308587317091875
2015	1.8370672267247006
2016	1.7531426208145005
2017	1.5662043497587608
2018	1.549721717573954
2019	1.502222314237099
2020	1.4346661487850214