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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $566,651,817 | 1,554,964,286 | 1,554,964,286 |
| 2006 | $924,627,185 | 2,336,272,092 | 2,336,272,092 |
| 2007 | $1,259,850,331 | 2,010,004,124 | 2,010,004,124 |
| 2008 | $1,879,389,747 | 2,402,029,562 | 2,402,029,562 |
| 2009 | $1,675,850,018 | 2,590,056,752 | 2,590,056,752 |
| 2010 | $2,312,971,826 | 2,883,067,134 | 2,883,067,134 |
| 2011 | $3,796,528,454 | 3,700,065,572 | 3,700,065,572 |
Note: Quantity represents Weight in kilograms
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