2004 2005 2006 2007 2008 2009 2010 2011 2012 $0 $5,000,000 $10,000,000 $15,000,000 $20,000,000
| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,261,475 | 5,185,259 | 5,185,259 |
| 2006 | $363,862 | 1,053,023 | 1,053,023 |
| 2007 | $696,491 | 1,637,708 | 1,637,708 |
| 2008 | $4,529,629 | 10,077,271 | 10,077,271 |
| 2009 | $10,880,858 | 45,825,064 | 45,825,064 |
| 2010 | $14,500,956 | 53,756,447 | 53,756,447 |
| 2011 | $17,254,162 | 47,962,789 | 47,962,789 |
Note: Quantity represents Weight in kilograms
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