Year	% of total merchandise exports
1960	5.229669329573704
1961	5.4048663307702
1962	5.3952485927202165
1963	5.380101826119278
1964	7.014544890767192
1965	7.574379405350731
1966	6.535193234358394
1967	5.891893084882255
1968	6.5620915492418534
1969	7.0154323989282545
1970	6.741336553523264
1971	7.133930166163028
1972	7.252467333650765
1973	6.977852820833464
1974	6.269562306671518
1975	6.838479938028902
1976	6.235797427258951
1977	6.240395242183063
1978	6.010637934647238
1979	5.746984470119963
1980	6.181989332486195
1981	6.448879682325834
1982	6.098358427834367
1983	5.424125163179195
1984	5.6429578761038055
1985	5.432497372886278
1986	5.75381606091169
1987	5.720321022976214
1988	5.779447797939845
1989	6.163816411626229
1990	6.219956784247016
1991	6.535246342604943
1992	7.880226204320108
1993	8.67557397603041
1994	11.717948319453692
1995	12.375515162763143
1996	12.340206805825884
1997	12.54656885278316
1998	11.824976465595803
1999	10.091276951635262
2000	10.701373710240707
2001	10.752754082617946
2002	11.179901796484627
2003	11.60316790875843
2004	11.598628771793898
2005	11.886415984083603
2006	11.830565566445054
2007	12.898344258671646
2008	13.26358978978361
2009	12.725956488976106
2010	13.042096323001237
2011	13.585897628274774
2012	14.455367055174165
2013	14.786950853737801
2014	14.457538481203915
2015	14.43904199906791
2016	14.471257931356593
2017	15.148432104486458
2018	15.157738253069375
2019	15.838719205756204
2020	16.147140382667377