Year	% of merchandise exports
1974	30.57039495042658
1975	29.18849045603784
1976	30.106315050347945
1977	29.24312365896159
1978	33.5986331623564
1979	37.516269483062196
1981	41.00035615916566
1996	32.17243886562375
1997	29.485688641358482
1998	31.37385760282945
1999	31.545977994281518
2000	32.33811543122726
2001	31.571706619250307
2002	31.716183421693938
2003	31.22528111234673
2006	33.37704716202019
2007	40.995919630330995
2008	31.795657326503644
2009	39.72440611761955
2010	38.95623416688511
2011	41.00466321391077
2012	40.02415247774717
2013	39.169897100226386
2014	39.887249301163195
2015	35.699245872248184
2016	34.922227459661016
2017	38.46416267371775
2018	39.31004057348157
2019	38.51872222383076
2020	37.43604065295861
2021	36.87495865765039
2022	39.331152606463114