Year	% of total merchandise exports
1960	4.739662170107304
1961	4.3157022084320795
1962	4.199267227566642
1963	3.93946719163288
1964	5.525949703739153
1965	5.564905356130128
1966	5.378761793348676
1967	5.271675108615528
1968	5.549835488603463
1969	4.625365944411336
1970	4.9160146004279115
1971	5.984679211044056
1972	5.295740175147561
1973	5.188979957605696
1974	6.823166468938497
1975	8.02140884573629
1976	6.603921553559884
1977	7.081609983736648
1978	6.983180513706445
1979	6.5665250330744245
1980	7.040133744361989
1981	10.601213586018442
1982	10.81238296929619
1983	10.697264813735725
1984	10.186317250547667
1985	10.3753510395938
1986	9.346817486063406
1987	9.3059394816751
1988	9.545331426892808
1989	7.858313599192088
1990	7.321628277437369
1991	6.084806852943263
1992	8.167204749506311
1993	8.597537941734569
1994	7.710063959515506
1995	8.439465058006462
1996	8.397458383748498
1997	8.614959153755374
1998	8.22194537004914
1999	7.945391200860788
2000	8.14577405964336
2001	8.792401377500521
2002	9.47502602010533
2003	10.370596939938642
2004	10.975777734173935
2005	11.856041506374966
2006	12.877458438569148
2007	14.772422085985614
2008	15.872843225946593
2009	16.56479689128261
2010	17.33711060022719
2011	18.138571869693042
2012	18.55448410401689
2013	18.84709310172101
2014	19.2000058616555
2015	18.37461581488789
2016	18.61167694497294
2017	19.37962016265243
2018	19.82393696189993
2019	19.840566824287492
2020	19.312698438125693