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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,104,251,003 | 823,720,987 | 86 |
| 2006 | $1,956,423,437 | 1,459,402,834 | 114 |
| 2007 | $3,198,551,234 | 2,106,296,214 | 187 |
| 2008 | $5,587,367,142 | 3,735,034,906 | 274 |
| 2009 | $8,360,343,861 | 0 | 288 |
| 2010 | $6,916,898,678 | 2,370,645,589 | 259 |
| 2011 | $6,778,953,859 | 2,443,134,971 | 242 |
Note: Quantity represents Number of items
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