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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $4,929,516,488 | 20,244,421 | 788 |
| 2006 | $6,666,960,923 | 0 | 925 |
| 2007 | $6,537,285,194 | 0 | 1,001 |
| 2008 | $7,054,734,837 | 0 | 0 |
| 2009 | $1,421,822,094 | 0 | 85 |
| 2010 | $281,570,871 | 351,163 | 47 |
| 2011 | $212,070,297 | 309,105 | 45 |
Note: Quantity represents Number of items
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