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| Product | 2001 | 2002 | 2003 | 2004 | 2005 |
| Optical instruments and apparatus, n.e.s. | $892,000 | $514,000 | $566,000 | | |
| Instruments and appliances, n.e.s., for medical, surgical, dental or veterinary purposes | $5,318,000 | $3,417,000 | $3,406,000 | | |
| Meters and counters, n.e.s. | $845,000 | $682,000 | $2,113,000 | | |
| Measuring, checking, analysing and controlling instruments and apparatus, n.e.s. | $6,456,000 | $6,035,000 | $6,654,000 | | |
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