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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,300,261,973 | 11,246,688 | 138 |
| 2006 | $3,666,435,921 | 12,494,541 | 155 |
| 2007 | $4,058,507,472 | 0 | 147 |
| 2008 | $3,549,567,999 | 4,306,743 | 122 |
| 2009 | $4,583,825,037 | 5,172,070 | 158 |
| 2010 | $4,424,658,003 | 4,408,746 | 152 |
| 2011 | $4,004,216,502 | 4,555,345 | 138 |
Note: Quantity represents Number of items
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