Year	% of total merchandise exports
1960	3.400681884588489
1961	2.6634721163928448
1962	3.149377109545057
1963	3.460673406475914
1964	4.375543929564528
1965	5.2741665089414695
1966	5.043130953769922
1967	4.350793468821626
1968	4.781797177100428
1969	5.053241020669571
1970	5.170994985723345
1971	5.33763801636
1972	5.6294918957063445
1973	5.683354551754145
1974	6.974009402863734
1975	7.5431650051347
1976	6.480864529555818
1977	6.561996483392794
1978	5.4624329635959326
1979	5.652355375494022
1980	5.810869747533152
1981	6.97102979289083
1982	6.876387080242213
1983	5.621690407511493
1984	5.555574651834407
1985	4.9262156512682145
1986	4.645293571922628
1987	4.4148721815676435
1988	4.111977874694961
1989	4.353016035771871
1990	4.00167306234296
1991	3.948772681403062
1992	4.15413761619763
1993	4.736972907358141
1994	4.6402476555158
1995	4.476436880437374
1996	4.677614802584225
1997	5.026617236144978
1998	5.103922876295205
1999	4.092366870025835
2000	4.2335495121522255
2001	4.384980828471989
2002	3.8589532214236275
2003	3.6291693639687677
2004	3.86168240348465
2005	3.8574150954340074
2006	4.09241020274695
2007	4.320620817878784
2008	4.6688529852842
2009	4.566694217865917
2010	4.966293608625973
2011	5.177423349407238
2012	4.902197238156973
2013	4.885947912636764
2014	4.690814224898487
2015	4.741184160214798
2016	4.716461420406821
2017	4.922480348970253
2018	4.870812436436932
2019	4.776923177218928
2020	4.528595527797375