Year	% of total imports
1997	6.553963893186483
1998	6.33622759600648
1999	6.181903965248125
2000	5.796080348219424
2001	6.428476548413365
2002	6.465974684437211
2003	5.660145490209567
2004	5.387823022336864
2005	5.320979225500478
2006	5.137456243684932
2007	4.998965631503213
2008	4.6987687932045565
2009	5.563339298902318
2012	4.950442966678357
2013	5.320528770612583
2014	5.536943861124644
2015	5.822634303639821
2016	5.879363844126027
2017	5.94675143146044
2018	5.821019782637268
2019	6.124525988778311