Year	% of total merchandise exports
1960	9.14396887159533
1961	5.933429811866859
1962	8.005427408412483
1963	10.75208913649025
1964	10.981781376518217
1965	17.34463276836158
1966	12.956669498725573
1967	12.107419208010924
1968	14.180210484246986
1969	13.987002093021362
1970	11.4525590037314
1971	17.577197149643705
1972	24.20519462642114
1973	21.45902846863344
1974	13.818999785770394
1975	17.46586355631556
1976	12.809179391017055
1977	10.845567315352225
1978	9.880487568415578
1979	12.645982964325993
1980	13.20212455632365
1981	20.426859323728646
1982	10.900732988046382
1983	11.236756919795543
1984	12.335938495518837
1985	12.355115748816786
1986	7.205817093367598
1987	13.711557026617019
1988	10.20205618892508
1989	16.326020961612
1990	23.87306211018742
1991	16.109870010221645
1992	16.603981828927893
1993	21.61678443763482
1994	21.917000488464307
1995	21.88137707854338
1996	28.99429708874381
1997	25.51861442313264
1998	26.105650850248058
1999	24.05673186076664
2000	17.786773892659937
2001	14.061879699339244
2002	10.585409619417872
2003	9.701734738884909
2004	14.700294054758997
2005	14.904160120562308
2006	14.469214812792499
2007	15.828460423172055
2008	18.69835598449703
2009	23.055665096451747
2010	24.778288672305777
2011	20.7092197040884
2012	21.67981904383493
2013	26.850257189619555
2014	36.53426780702078
2015	32.62990154450242
2016	27.36694901723855
2017	37.9269483785071
2018	29.76840769400727
2019	32.69034085981545
2020	20.9860358728297