Year	% of merchandise exports
1970	11.412966580260399
1971	10.68498289805343
1972	11.0339871768252
1974	10.448142814669012
1975	10.833998803251092
1976	10.925639648025175
1977	19.132058391716274
1978	19.895453427871946
1979	20.798223929170213
1997	33.01067476922543
1998	32.34648167451204
2000	34.81492873313712
2001	35.31979013996061
2002	37.850777729985076
2003	36.28529270391202
2006	37.100710873389694
2007	35.85302634708785
2008	37.1249708200533
2009	36.98758080521305
2010	35.42189152245129
2011	33.06126928138561
2012	33.74486263436401
2013	36.39535162828478
2014	29.13520998822749
2015	38.803194450939884
2016	29.34806772129783
2017	28.300645070124485
2018	26.502978065075467
2019	26.962662353648078
2020	27.224476427757356
2021	27.62555196475436
2022	29.256438389994305