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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,665,524,407 | 1,440,742,516 | 1,440,742,516 |
| 2006 | $2,016,775,832 | 1,572,330,074 | 1,572,330,074 |
| 2007 | $2,754,708,066 | 2,005,279,707 | 2,005,279,707 |
| 2008 | $2,516,383,987 | 1,776,762,403 | 1,776,762,403 |
| 2009 | $1,791,982,689 | 1,602,331,321 | 1,602,331,321 |
| 2010 | $1,890,069,509 | 1,233,831,804 | 1,233,831,804 |
| 2011 | $2,145,198,184 | 1,205,262,899 | 1,205,262,899 |
Note: Quantity represents Weight in kilograms
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