Year	% of total merchandise exports
1960	2.668052982502084
1961	2.9170553713751337
1962	3.1568171154079225
1963	2.517257100817595
1964	4.570289754730517
1965	5.087048992557869
1966	4.098999543047206
1967	3.241469911910724
1968	4.445728530017754
1969	3.3345643571138375
1970	3.5537295767621226
1971	4.251681058415318
1972	3.6734773372037384
1973	3.0063056458325743
1974	2.575605763102517
1975	3.12911778693886
1976	2.554970308518781
1977	2.5984422889845935
1978	2.5291624425757346
1979	2.2942379404217883
1980	2.3929232313532514
1981	2.7125174350532046
1982	2.382150400592677
1983	2.215942053260396
1984	2.28661825959289
1985	2.2906611228178106
1986	2.7325479735612546
1987	2.4699528547024396
1988	2.6303641331774807
1989	2.397027911946346
1990	2.621456623690802
1991	2.4864187029193583
1992	2.6919161567512147
1993	2.487424781087429
1994	2.485220855467609
1995	3.132633774006268
1996	2.7661686219988657
1997	2.934410700147552
1998	3.1335187231605404
1999	2.7987280822468357
2000	3.4351630686884747
2001	3.4376702076911805
2002	3.982164203374631
2003	3.914139467031997
2004	4.184292376962674
2005	4.178934872613752
2006	4.119466377799355
2007	4.290955237304726
2008	4.133925615299839
2009	4.951330246572316
2010	4.916647856419413
2011	5.4128463887388065
2012	5.6382267265980675
2013	5.618772301017329
2014	5.857391178527923
2015	5.699855839555211
2016	4.950381539831058
2017	4.4298087560606
2018	4.340207585440133
2019	4.720023511595815
2020	4.753526728201971