2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $10,000,000 $20,000,000 $30,000,000 $40,000,000 $50,000,000 $60,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,153,947 | 3,776,056 | 3,776,056 |
| 2006 | $1,033,781 | 2,710,386 | 2,710,386 |
| 2007 | $682,438 | 1,229,363 | 1,229,363 |
| 2008 | $4,003,864 | 8,027,284 | 8,027,284 |
| 2009 | $3,315,958 | 14,431,142 | 14,431,142 |
| 2010 | $22,566,130 | 74,030,267 | 74,030,267 |
| 2011 | $52,629,175 | 148,752,997 | 148,752,997 |
Note: Quantity represents Weight in kilograms
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