Year	% of total merchandise exports
1960	43.262411347517734
1961	40.88669950738917
1963	28.47682119205298
1964	30.952380952380953
1965	28.08880308880309
1966	34.89736070381232
1967	29.09439553734856
1968	32.22440117663538
1969	29.71446306641837
1970	29.462482946794
1971	34.32786885245901
1972	27.889064439679494
1973	21.842330199224143
1981	22.55983980548396
1982	20.39527662418425
1983	19.286983908438625
1984	15.729459934021033
1985	19.25324620163293
1986	18.056114126277922
1987	13.065265576097278
1988	12.889625364305074
1989	7.603127602832897
1990	16.054120055219528
1991	19.942480912154853
1992	26.42410856453384
1993	22.72998703427147
1994	20.418901356661344
1995	14.105784455741869
1996	14.912893887114679
1997	16.410640636728864
1998	17.392314412424252
1999	17.553505971384652
2000	19.123644484015028
2001	23.09761026109266
2002	25.797260503617753
2003	24.051550006767766
2004	33.69829472788436
2005	31.80978732247466
2006	23.578623699289757
2007	24.863149752086468
2008	27.2626193202004
2009	23.47047742599452
2010	23.429673481190434
2011	17.18514441550786
2012	20.99811816838386
2013	31.223181855993136
2014	26.508340120668763
2015	24.579385883640978
2016	20.902332752330754
2017	20.910088819956947
2018	20.790463900602443
2019	17.01368282441894
2020	14.655354133943188