Year	% of total merchandise exports
1960	75.5824790307549
1961	76.95136902329382
1962	76.06191504679626
1963	79.79363714531385
1964	79.0792699536911
1965	79.41660785697484
1966	79.31241255246852
1967	79.11095048789304
1968	76.421875
1969	78.0904148152237
1970	78.98211407077608
1971	78.3950809950373
1972	81.23411883462704
1973	82.4345442083619
1974	79.10529575889798
1975	77.67861743458681
1976	75.1383937628612
1977	73.00843760036074
1978	71.23855451260953
1979	74.94124623866108
1980	74.89942813847347
1981	72.70019212803835
1982	68.59974654334297
1983	74.11714039621017
1984	73.54024650554294
1985	76.2515107181477
1986	76.5405027932961
1987	74.25468787087586
1988	75.67157182455568
1989	77.5043493153772
1990	78.26822157434403
1991	77.33114951941727
1992	76.52566703671094
1993	75.54828647537025
1994	75.02220221657197
1995	77.20726263152083
1996	78.316238727886
1997	82.7018654156801
1998	82.57584494018255
1999	82.94860660949398
2000	79.78735072089546
2001	80.50889761800661
2002	80.65245160656383
2003	79.96478378136544
2004	80.09771496513518
2005	81.3367367343818
2006	82.00837450944071
2007	79.59765381347854
2008	77.89624598763015
2009	76.22191897404294
2010	73.58701159972063
2011	73.22161859989355
2012	72.20882352010281
2013	71.18237032765022
2014	71.20944491817923
2015	67.8633133505249
2016	71.37906581724032
2017	75.17141062404298
2018	72.76572099419273
2019	71.2367211665167
2020	67.63218860029595