Year	% of total merchandise exports
1960	4.312031637345291
1961	3.34477248328418
1962	3.0878038564568073
1963	2.2596322503194695
1964	2.8178562480656715
1965	2.9118971653543957
1966	2.9071665319847853
1967	2.5652640490201764
1968	2.8068148650257507
1969	2.8438705637337867
1970	2.8334842100068083
1971	1.3243157664148029
1972	1.7499023789282908
1973	2.959423428491743
1974	4.608604835560184
1975	4.237931244267372
1976	3.087602942530126
1977	3.2406768980410763
1978	2.9240454132321614
1979	2.6425714009871193
1980	4.736324041261839
1981	6.750237673885493
1982	7.856762384825725
1983	7.432616630484547
1984	7.131858475525937
1985	7.508939655763842
1986	5.7346160496778165
1987	4.647714446545548
1988	6.210715113733331
1989	6.40820879617028
1990	4.798911942052865
1991	4.4669093957952395
1992	3.583367121431004
1993	5.395097652918107
1994	8.984932212148399
1995	9.144295863644357
1996	6.023022757313188
1997	6.407036755316202
1998	8.03247817655197
1999	5.482601245080647
2000	6.110549732929591
2001	4.679716710767304
2002	5.7200952204614195
2003	4.478915821297437
2004	6.595867644442746
2005	5.34469038210683
2006	6.088863080488289
2007	4.021236993980069
2008	4.28960553678095
2009	4.7937914935518275
2010	3.788860697742838
2011	4.959578864972995
2012	4.17849507386836
2013	4.48449817265241
2014	4.555539517139989
2015	3.6417449559826793
2016	2.0552932676633406
2017	1.6666834290455272
2018	1.6724267881278887
2019	0.9882162772352043
2020	0.9256455758724815