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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $4,044,792,937 | 187,519,376 | 51,798,051 |
| 2006 | $4,473,245,436 | 175,426,552 | 54,258,645 |
| 2007 | $3,498,413,409 | 180,267,758 | 45,104,954 |
| 2008 | $2,425,459,658 | 0 | 31,742,833 |
| 2009 | $3,083,685,208 | 72,213,421 | 41,537,551 |
| 2010 | $2,642,073,686 | 0 | 37,478,394 |
| 2011 | $2,181,171,361 | 0 | 33,909,122 |
Note: Quantity represents Number of items
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