Year	% of total merchandise exports
1981	68.26694741670323
1982	65.70901939603854
1983	71.56539906659222
1984	66.84236252087138
1985	59.07467852311863
1986	63.73902321645836
1987	57.43888674939049
1988	64.17298133494643
1989	60.395493677390114
1990	66.97123266443039
1991	80.68793560800977
1992	71.98081077120673
1993	77.45037639777166
1994	87.64398296881217
1995	82.52252831524281
1996	89.33012744798343
1997	95.94405834747702
1998	96.7692258411032
1999	96.62912458193283
2000	96.04565439919985
2001	93.44935231727123
2002	95.13845542935812
2003	94.94381194818476
2004	91.24881733340672
2005	92.90222467489929
2006	94.06233118049286
2007	89.1461046536668
2008	79.8872994135834
2009	80.51362218954824
2010	76.45964485560933
2011	75.55787847325557
2012	78.51413542553766
2013	74.73937101967297
2014	74.43579534360323
2015	73.66175713726538
2016	79.45956228928821
2017	78.80525096121114
2018	79.15881317080242
2019	78.09977034810944
2020	76.48200098424256