Year	% of total merchandise exports
1960	84.0926640926641
1961	83.87837062535858
1962	74.69015003261579
1963	81.79068360556563
1964	81.09313998884551
1965	81.59958180867747
1966	78.08807733619764
1967	79.6471329552615
1968	84.21052631578947
1969	76.07408516798961
1970	71.14604091435359
1971	67.53801726820163
1972	79.07615550634863
1973	76.68493542687933
1974	49.91953905691925
1975	57.06753775179805
1976	63.42586646606608
1977	58.29782050838893
1978	59.79496487413664
1979	54.430386165335
1980	46.84018134619616
1981	48.03642442624933
1982	44.59382223074703
1983	44.093737978723105
1984	51.79253341238772
1985	50.769492390102876
1986	48.97071420430941
1987	56.54019296931043
1988	47.561716764904155
1989	44.713662943923204
1990	43.794279413319984
1991	47.0027824557912
1992	51.21452167214766
1993	41.41886774876411
1994	39.10403556560675
1995	37.977598240528664
1996	38.49389194098317
1997	35.85413864771166
1998	32.86240167564306
1999	38.34771875273039
2000	37.98991576838993
2001	38.795385995850296
2002	42.44408829483314
2003	46.74157241638465
2004	51.1015636414875
2005	51.47708521201167
2006	44.66088331603958
2007	41.32612247066626
2008	32.219808743770514
2009	27.219521710830318
2010	25.465000213497685
2011	25.7983205483917
2012	23.79355200675614
2013	22.810631855089834
2014	22.74070514854181
2015	26.30427233112452
2016	26.68951297843224
2017	23.336340385922277
2018	22.963835367489164
2019	19.37454188901236
2020	23.121220618353895