Year	% of total merchandise exports
1961	2.8000000000000003
1962	24.521072796934863
1963	29.166666666666668
1964	28.40909090909091
1965	33.86666666666667
1966	33.1002331002331
1967	32.13443952107099
1968	31.147540983606557
1970	28.0939615012745
1971	33.66016841619564
1972	31.900457538221183
1973	24.71467264406463
1974	33.08667327573998
1975	21.38214741903975
1976	24.235967157299857
1977	25.000786518032236
1978	30.375300425217233
1979	23.23122365669908
1980	23.56887737236501
1981	14.572820152217075
1982	26.543181057758897
1983	20.995410498484716
1984	19.778253088305906
1985	19.545078672996745
1986	22.019997218542077
1987	27.235667308412904
1988	26.604906204906204
1989	28.254522960990208
1990	39.65435284641441
1991	31.11610194316961
1992	12.961541818338967
1993	1.6584885680621744
1994	1.3736556510741262
1995	19.31098197615995
1996	22.874612732255976
1997	22.8994996742461
1998	16.71878935097669
1999	16.086621669264822
2000	17.91995626389528
2001	19.618237005257637
2002	19.3721057016644
2003	1.9316399894733431
2004	2.4228745257811037
2005	2.940474849089563
2006	2.6017511081736506
2007	3.790930783072563
2008	6.124495829536486
2009	5.697201248004285
2010	4.063813302216322
2011	1.4457249319678944
2012	1.3816457387057404
2013	1.5144356663224312
2014	1.4463281506055816
2015	1.2601355038864945
2016	1.278679308661274
2017	21.768741295418497
2018	25.911536711173166
2019	17.583207765425524
2020	24.772785406810613