Year	% of total merchandise exports
1960	0.8319914117015567
1961	0.9915014164305949
1962	0.8364813815434431
1963	0.9491903964265772
1964	1.1709601873536302
1965	0.9311443273707424
1966	0.4264998578333807
1967	1.66270783847981
1968	1.7814009661835748
1969	5.824269905190729
1970	5.572228055940051
1971	5.836932379072063
1974	6.785133557301777
1975	13.58516335405959
1976	11.412666961557182
1977	17.339719780944204
1978	18.51101109698698
1979	12.913614781552504
1980	14.101079857071234
1981	12.083457467851195
1982	13.104599503331531
1983	17.350955543366236
1984	21.77409917189572
1985	16.30791488621585
1986	12.839891626886853
1987	14.12427430705974
1988	13.098371903528788
1989	10.750632321976191
1990	13.539561445202938
1991	10.263423534931775
1992	6.049354870424669
1993	4.341016825540564
1994	5.001562988433886
1995	4.3409629044988165
1996	4.744436292492052
1997	4.1477640959170445
1998	4.3591580281652185
1999	3.482040111918107
2000	3.8098188800872395
2001	4.285573650453275
2002	3.9230719742128177
2003	3.982372055814829
2004	3.653987362435866
2005	4.0266969618401225
2006	4.133752312934769
2007	3.8743135615364475
2008	4.819579473601353
2009	5.507761977069422
2010	5.1584714418256326
2011	4.667956203864734
2012	5.4002992908886345
2013	4.815733711170339
2014	4.626424469787654
2015	4.205948751475919
2016	4.941074253195033
2017	4.741776111330545
2018	4.419063939609866
2019	3.6476885060753697
2020	3.648553162421998