Year	% of total merchandise exports
1967	4.078931140801644
1968	5.534792138797043
1969	6.194191012326507
1970	5.045106039279966
1971	5.805423037218479
1972	4.850041946308725
1973	4.406817524770689
1974	4.4815002893347655
1975	5.478353470149744
1976	4.3041636688779485
1977	5.237629539533699
1978	4.035714141186595
1979	4.432509826650128
1980	5.252250451942135
1981	4.641434432147316
1982	6.19577276713348
1983	6.995219720828298
1984	6.759484392481438
1985	7.425771815391326
1986	6.049784378360703
1987	7.151855005595882
1988	6.929375486593592
1989	7.502861942791903
1990	8.35428848420947
1991	7.72620183924015
1992	8.43096812925806
1993	9.008653500353429
1994	10.13739635792586
1995	9.504624333206669
1996	10.109961034841525
1997	10.075171205934149
1998	9.851867871503803
1999	9.856072648510903
2000	11.051703121478932
2001	12.261097530953268
2002	14.320568180397444
2003	15.334422122721946
2004	16.582551899834797
2005	16.90979231838721
2006	17.779852197918483
2007	19.715993745566397
2008	20.535007656567174
2009	23.84587895114851
2010	24.483670539577755
2011	25.161346594010226
2012	25.879137212753438
2013	27.582431963904163
2014	25.62672988742748
2015	27.120509537002768
2016	27.346967909447027
2017	28.140982260589343
2018	28.60697356376205
2019	29.05954481865067
2020	29.340667263067466