Year	% of total merchandise exports
1960	0.303161541792984
1961	0.3498662276188516
1962	1.4003819223424572
1963	1.5822188736108496
1964	4.2588587589419395
1965	2.7737031604213898
1966	2.557871850620284
1967	2.3019034971226207
1968	3.1075831785171424
1969	2.885371056472437
1970	2.299685306221254
1971	1.9942547784775162
1972	1.4132978479328224
1973	0.47381041805102125
1974	0.07701318986463034
1975	0.13758771216650614
1976	0.954458938767931
1977	0.7155846902093466
1978	0.778448526974497
1979	0.5138865501082935
1981	3.3339750159987096
1982	1.605702256318965
1983	0.953210296169368
1984	1.1608998860054986
1985	4.519489268501308
1986	1.9048418200342385
1987	1.904841819723455
1988	2.2987838703560417
1989	1.142814068563525
1990	0.23295063593827803
1991	2.29978281654325
1992	5.020420750081316
1993	7.462159734994351
1994	7.683262518349321
1995	10.037378557368259
1996	11.95550624248182
1997	12.544659635619448
1998	16.496806302310713
1999	26.697524076469342
2000	20.697623201598546
2001	21.806459484483163
2002	26.483386372093808
2003	21.11366321118682
2004	26.88523878594487
2005	22.430347951802656
2006	21.598812885982902
2007	21.181596567477452
2008	30.14935578187834
2009	33.19935406974178
2010	35.094580315476826
2011	34.985191898808154
2012	35.42277493661454
2013	41.1257759908584
2014	47.85947675383106
2015	48.712946889090006
2016	47.55713680495868
2017	44.40235203648737
2018	44.4965092169397
2019	47.23519708634221
2020	49.68411180320986