Year	% of total merchandise exports
1972	14.975992683484504
1973	13.386730893102191
1974	15.271803458529403
1975	12.616936716600428
1976	9.082962888966586
1977	10.260521042084168
1978	12.130777024394046
1979	13.395116300338383
1980	9.44733411797461
1981	7.770266001137298
1982	9.733614561362394
1983	13.060762498964746
1984	11.053852099974232
1985	9.39643003734145
1986	9.21690609848016
1987	8.828008915304606
1988	8.514247209808461
1989	8.07461769909246
1990	8.23569501495053
1991	7.1563687699315786
1992	4.945916876900399
1993	4.72097349205377
1994	4.735186948981993
1995	4.441855288387645
1996	5.376694007380642
1997	0.46607241819017653
1998	0.42181053300889887
1999	15.038592344149713
2000	14.536417187273361
2001	15.95610684216277
2002	16.47103601510741
2003	15.686328458053826
2004	13.185607256246582
2005	15.067229486000958
2006	15.375718072536795
2007	14.785411417885907
2008	13.97038419567204
2009	13.800794931589843
2010	14.644416822523398
2011	14.540415722737018
2012	15.989953047388298
2013	16.423454393790134
2014	17.003956939296756
2015	17.648455643358368
2016	17.804517567686748
2017	18.131779743934523
2018	18.237888561277778
2019	17.02002008853263
2020	15.209454532398933