Year	% of total merchandise exports
1960	1.6848099504404697
1961	1.3123359580052494
1962	1.1899976857772743
1963	0.7114598588009005
1964	0.7789113262517146
1965	0.7811219752007429
1966	0.8552670692452077
1967	0.8546325298140303
1968	0.843407668582795
1969	1.1111006131839267
1970	0.9913596833945146
1971	0.9947696884965125
1972	0.8042390688224462
1973	0.692245324265602
1974	1.1807969007146315
1975	1.1124952274466133
1976	0.588732653332023
1977	0.4907370055047129
1978	0.5171528251237965
1979	0.7978885213330178
1980	0.980270784627526
1981	1.2939330351945437
1982	1.166978267960111
1983	1.1492036986752143
1984	0.8638131052152886
1985	0.9974730302884753
1986	1.1066624803128426
1987	0.9038373146499327
1988	0.9370303290421527
1989	1.1332534324502355
1990	1.098013592554779
1991	0.8068624616875164
1992	0.820033796124479
1993	0.8197194418690459
1994	0.7392861731971972
1995	0.617859388414209
1996	0.6214844366133953
1997	0.3757921110019944
1998	0.24015324868805926
1999	0.3047611054580552
2000	0.29543973302904797
2001	0.2859352512394813
2002	0.2696524090773954
2003	0.2373041879898532
2004	0.2711941617091713
2005	0.39306258272800837
2006	0.39965135917927963
2007	0.3806288341459709
2008	0.44739330718248205
2009	0.463226130639727
2010	0.45875871357452447
2011	0.4938865384574735
2012	0.42458523472702686
2013	0.34646656926397856
2014	0.3365191745265965
2015	0.34244808947742506
2016	0.393773492283444
2017	0.37454689104082417
2018	0.3618894133880269
2019	0.33876856750258283
2020	0.3170803279226787