Year	% of total merchandise exports
1960	9.03522205206738
1961	7.743082000507743
1962	11.517323775388292
1963	7.682263329706203
1964	9.347514829208427
1965	9.01279358411304
1966	4.681208053691275
1967	2.8470942890638082
1968	2.2367703218767043
1969	2.869278521994832
1970	2.5797269662300337
1971	2.838841608275945
1972	3.2672232283522535
1973	1.8692865398760115
1974	6.283670524117284
1975	7.875334164185209
1976	6.342627696973875
1977	7.71760896425376
1978	5.913653810022278
1979	7.2736382297716675
1980	7.1660902031747495
1981	6.104232651885978
1982	6.630913171471042
1983	3.1731732382823177
1984	4.08718387637617
1985	5.842420081652924
1986	3.9907893492243662
1987	4.534681207329185
1988	5.764714491953351
1989	3.538340045025107
1990	4.018903972613103
1991	3.477750103867537
1992	5.174595330796064
1993	3.46642104511918
1994	3.619676064617925
1995	3.4109200741208907
1996	2.713634056208537
1997	2.8356586650075495
1998	5.349778722042982
1999	4.538055558142876
2000	4.5577163591248055
2001	4.423337110503899
2002	4.573558452049823
2003	6.284184146605915
2004	7.220966511922813
2005	11.198743484268737
2006	10.465160450456318
2007	9.121842252648966
2008	12.116502929222309
2009	12.395367600353753
2010	13.42784105689185
2011	16.650925960993803
2012	13.925053805380177
2013	13.689595212747255
2014	13.077943578011563
2015	13.572758802897104
2016	12.743496361877444
2017	12.303293186616942
2018	11.69502528038361
2019	10.097521120014843
2020	7.757909497030445