Year	% of total merchandise exports
1971	0.047173083593479014
1972	0.223997243110854
1973	0.3945686418584988
1990	0.019225524692659535
1991	3.05895930539697
1992	1.1288354184549587
1993	1.635013375256434
1994	2.3432855900183944
1995	0.7146759138303683
1996	2.6864272365619937
1997	3.0692226571319305
1998	4.979928218340436
1999	1.951187919874294
2000	4.634638398917105
2001	11.786318838913415
2002	7.8274931428893675
2003	5.057959895907014
2004	5.1201344314402455
2005	3.480656324493302
2006	5.368440796465977
2007	2.5906196847880527
2008	3.2237181029557282
2009	7.10073766641129
2010	9.661703284985544
2011	4.838280852414579
2012	6.925616769652986
2013	1.2294188370876185
2014	4.882781607147564
2015	6.221279590675214
2016	3.378135461209485
2017	7.050510908766549
2018	6.464822191233037
2019	8.438662196432224
2020	4.437504654578706