Year	% of merchandise imports
1970	24.36902477181404
1971	23.937008070684865
1972	23.988550767788126
1973	25.439856523788237
1974	25.920667264639714
1975	23.569052024840772
1976	24.502935322488895
1977	24.47921520807383
1978	24.75080666425436
1979	21.168112396460597
1980	20.02879316158402
1981	19.044228539590453
1982	19.934170536829527
1983	20.42929727542011
1984	21.35038491055088
1985	20.540002158778297
1986	19.752828213848172
1987	21.29046897323936
2002	22.617393081637722
2003	21.071362171928193
2004	20.444233967455727
2005	19.35669522707424
2006	18.460706453772794
2007	19.289009278415765
2008	20.392535779424886
2009	24.654760750504238
2010	22.209575822385286
2011	23.383062970665797
2012	22.938831605111957
2013	19.861055847917623
2014	20.642759027199492
2015	21.42938341534347
2016	21.117549916085856
2017	21.412803704182647
2018	19.684246834832802