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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,552,055,939 | 9,936,198 | 33,333,215 |
| 2006 | $2,816,168,194 | 10,981,123 | 32,614,541 |
| 2007 | $2,093,921,797 | 7,136,507 | 22,602,501 |
| 2008 | $2,207,275,854 | 7,446,171 | 24,590,024 |
| 2009 | $1,433,368,717 | 4,777,835 | 16,299,618 |
| 2010 | $1,007,733,800 | 3,692,895 | 7,077,094 |
| 2011 | $538,230,543 | 1,917,026 | 7,381,284 |
Note: Quantity represents Number of items
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