Year	% of total merchandise exports
1964	1.0611170519042528
1965	1.6850393700787403
1966	1.1083932120470876
1967	1.557535031515341
1968	0.5883611467693625
1981	1.0291338672079482
1982	0.8783985882546929
1983	0.6245025324830638
1984	0.004092944689171995
1985	0.6984393993555992
1986	1.0293821486910841
1987	0.7780354894391397
1988	3.5857689793631526
1989	3.1885941441785794
1990	2.382284382284382
1991	2.147794866298698
1992	2.138614858063217
1993	3.108407079646018
1994	2.146238550993105
1995	2.685185185185185
1996	0.7369032200437676
1997	4.62493471448468
1998	3.349595974996188
1999	3.8725630052306226
2000	11.78642049378016
2001	15.54013002959597
2002	14.756637453430502
2003	13.752645645789627
2004	14.490208437870795
2005	16.024282423276087
2006	17.18957209204742
2007	16.876151936577145
2008	19.013867260329835
2009	20.987031125430974
2010	21.60966702937161
2011	27.79628369515672
2012	30.053755064420272
2013	38.61405719739337
2014	40.5547781569541
2015	38.578995555341365
2016	30.475426716358832
2017	28.216446500911534
2018	30.740493124327678
2019	42.63964142372857
2020	41.90616992272101