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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Contact lenses | $43,962 | $22,948 | $91,573 | $1,685 | $71,540 | $1,188,809 | $2,151,617 |
| Spectacle lenses of glass, unmounted | $577,887 | $103,642 | $440,675 | $596,686 | $535,761 | $154,054 | $10,685,271 |
| Spectacle lenses of mats. other than glass, unmounted | $144,766,556 | $142,934,820 | $120,210,300 | $138,709,437 | $134,760,590 | $138,954,010 | $125,077,466 |
| Lenses (excl. of 9001.30-9001.50), prisms, mirrors & oth. optical elements, ... | $3,985,420 | $348,941 | $2,299,931 | $565,728 | $2,443,920 | $787,054 | $4,665,501 |
| Total | $149,373,825 | $143,410,351 | $123,042,479 | $139,873,536 | $137,811,811 | $141,083,927 | $142,579,855 |
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