Year	% of total merchandise exports
1960	4.543134252169474
1961	6.245239908606245
1962	5.639187574671445
1963	6.115342763873776
1964	5.154428308447535
1965	5.098338743555471
1966	5.033557046979865
1967	6.380840730195947
1968	5.769230769230769
1969	8.232096711913742
1970	7.642458409329575
1971	9.660782485790756
1972	9.117010468660276
1973	9.273930860565304
1974	17.69646554737852
1975	23.450952784146583
1976	23.12245812366444
1977	21.633505176600913
1978	17.924819497007274
1979	19.926256700619714
1980	17.02514297058127
1981	20.959970026954927
1982	22.758293325782905
1983	22.50035774219146
1984	18.524424226080907
1985	16.13485148370228
1986	15.090273836549375
1987	11.582472520354848
1988	10.480492667425095
1989	8.207129469124624
1990	8.440501033845434
1991	9.862461375664623
1992	12.266216634991931
1993	13.121871433443985
1994	10.964657779697447
1995	10.516153156475506
1996	10.14869827187048
1997	10.492877329437352
1998	10.9549967603969
1999	11.754404647592388
2000	12.640994436529466
2001	14.8478639602518
2002	16.49735234935685
2003	16.772909937235443
2004	13.320510396453253
2005	12.997902628081635
2006	12.124212068951918
2007	17.603832272433568
2008	18.416571829182047
2009	17.197902777822645
2010	15.167698568842061
2011	13.885648070922734
2012	17.81212215391253
2013	13.590208316060131
2014	11.951114511771852
2015	10.109960625246314
2016	9.367402665535222
2017	8.733908032498725
2018	8.893368910365606
2019	10.56288901007727
2020	10.961834590570234