Year	% of total imports
1997	6.510241913167065
1998	6.242008616157224
1999	6.2534807198924325
2000	5.793103432806829
2001	6.491389535372641
2002	6.518562834689755
2003	5.563881601091856
2004	5.3414478423897656
2005	5.333657370161438
2006	4.990736266455217
2007	4.801507336487601
2008	4.451555423015255
2012	4.886826513060598
2013	5.293047015176532
2014	5.518585126604402
2015	5.731297254743154
2016	5.892980637532644