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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $16,800 | 4,578 | 1,830 |
| 2006 | $43,200 | 4,900 | 2,240 |
| 2007 | $15,100 | 1,385 | 684 |
| 2008 | $59,900 | 3,832 | 1,319 |
| 2009 | $34,000 | 2,176 | 830 |
| 2010 | $16,900 | 1,356 | 558 |
| 2011 | $8,400 | 1,075 | 215 |
Note: Quantity represents Area in square metres
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