Year	% of total imports
1997	6.305981528387716
1998	6.284842095122269
1999	6.094454601992887
2000	5.781958393570174
2001	6.032473327788957
2002	6.042312918564109
2003	5.1937833026816955
2004	4.903019370164691
2005	4.843304013761057
2006	4.780833389895696
2007	4.842712947421355
2008	4.54415985056244
2012	4.528308256582681