Year	% of total merchandise exports
1961	12.473392933163048
1978	5.874489647882945
1979	5.9001490532902405
1980	6.979359618946811
1981	13.572479695998807
1982	17.007194771098337
1983	16.728977884798173
1984	14.2141754996636
1985	10.7316930372799
1986	10.731876827141642
1987	11.34078353859409
1988	8.831934536298784
1989	5.034493065334706
1990	5.626594031161955
1991	4.504613422546031
1992	7.581697127513717
1993	8.71885864447705
1994	6.397478157267673
1995	6.868993065112751
1996	6.597486157326859
1997	6.953494093143016
1998	7.750020952494979
1999	7.428759695489802
2000	7.775703569995988
2001	8.257998297795758
2002	8.666554515565569
2003	9.392186545039909
2004	10.074596368043636
2005	10.936368073175915
2006	12.524687907948712
2007	14.847606069812699
2008	16.68786089707251
2009	16.147478973420405
2010	17.087858479954892
2011	17.892338656754138
2012	17.827888021306382
2013	18.118435919182506
2014	18.90280253254069
2015	18.164776597253283
2016	18.51321100445102
2017	19.055369662250175
2018	19.02952219739099
2019	19.522900922935303
2020	18.206832856559995