Year	% of total merchandise exports
1960	8.754863813229571
1961	5.571635311143271
1962	7.327001356852103
1963	4.456824512534819
1964	6.680161943319838
1965	8.192090395480225
1966	7.094307561597281
1967	6.918525261720528
1968	7.154216345833611
1969	8.235265373934148
1970	6.854337177341338
1971	7.40971556976856
1972	7.780989744648633
1973	7.093534764835177
1974	6.462831163266763
1975	5.747428600597228
1976	5.748281096526476
1977	4.1133332934019355
1978	3.6649156979050073
1979	5.170801923191073
1980	2.947009430508488
1981	7.305441717013815
1982	2.625271062205416
1983	2.7003226275563788
1984	6.539629613897974
1985	3.234059648788946
1986	5.312419331915992
1987	6.86112260377879
1988	1.8875058166589112
1989	10.74497225669
1990	19.834353707132085
1991	11.561377089054686
1992	10.593579898008795
1993	12.38824301074696
1994	12.488284898997318
1995	10.605677411390113
1996	13.727807042482013
1997	14.981106831235108
1998	21.685808328721368
1999	20.191339226776524
2000	14.727849763545056
2001	11.694118709031983
2002	8.304772525443836
2003	7.3076779025966
2004	7.798700597713052
2005	5.239671416966515
2006	4.279997974536727
2007	5.242682006595483
2008	6.044084566664944
2009	6.742602026879478
2010	6.001337153853462
2011	4.795915547481016
2012	9.382745621342028
2013	17.411560360123577
2014	22.292497924299546
2015	20.33010162647765
2016	15.216640204914597
2017	24.081719005942908
2018	21.480940813673268
2019	19.56916929086431
2020	10.299402818221973