Year	% of total merchandise exports
1960	3.236098450319052
1961	3.618817852834741
1962	3.2151991231275123
1963	3.2520519254235873
1964	3.4357846439363815
1965	4.153979617164441
1966	3.561749549644168
1967	21.928897857439612
1968	20.32601444098737
1969	19.14125425485719
1970	3.510457853086413
1971	18.44648521807147
1972	12.55270867620496
1973	8.010595872384132
1974	9.524067490045418
1975	10.41783521655001
1976	11.582849258856902
1977	11.618196312444082
1978	13.0929623738886
1979	11.942148509623806
1980	14.006884965488938
1981	12.298153404039054
1982	10.690252589816705
1983	10.75043356973735
1984	11.987699387051387
1985	12.174485833406187
1986	10.986091506151176
1987	12.162614170421332
1988	9.878297172586084
1989	8.862107439100786
1990	8.675055074704
1991	12.23031846440735
1992	13.155088434250784
1993	15.121611475828894
1994	12.420972829233047
1995	12.613175343237973
1996	12.380001921771987
1997	15.307544324742405
1998	12.41320463654014
1999	12.278668000253498
2000	9.292081177978421
2001	11.014659465815004
2002	11.103868647088024
2003	10.035768268216803
2004	13.160545867095145
2005	13.12370312991121
2006	15.17421324956197
2007	15.30222628511733
2008	13.907579838134291
2009	16.922244683817073
2010	17.715471303988377
2011	18.66591169036405
2012	21.731874020422502
2013	21.937171302069792
2014	25.67273045452335
2015	23.61077007282489
2016	26.002361101985272
2017	29.14536370881573
2018	30.534880390757085
2019	31.740023243876426
2020	33.697016446464865