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| TABLE 2 | ||||||||||||||||||
| EMPLOYMENT AT IRON ORE MINES AND BENEFICIATING PLANTS, QUANTITY AND TENOR OF ORE PRODUCED, AND AVERAGE | ||||||||||||||||||
| OUTPUT PER WORKER HOUR IN THE UNITED STATES IN 2005, BY DISTRICT AND STATE1 | ||||||||||||||||||
| Production | ||||||||||||||||||
| Iron contained | Iron | Average quantity per worker hour | ||||||||||||||||
| Average | Crude ore | Usable ore | (in usable ore) | content | (metric tons) | |||||||||||||
| number of | Worker hours | (thousand | (thousand | (thousand | natural | Iron | ||||||||||||
| District and State | employees | (thousands) | metric tons) | metric tons) | metric tons) | (percent) | Crude ore | Usable ore | contained | |||||||||
| Lake Superior: | ||||||||||||||||||
| Michigan2 | 1,160 | 2,570 | 37,900 | 12,900 | 7,790 | 60.2 | 14.79 | 5.04 | 3.04 | |||||||||
| Minnesota | 3,170 | 6,540 | 138,000 | 41,400 | 26,400 | 63.8 | 21.07 | 6.33 | 4.04 | |||||||||
| Total or average | 4,330 | 9,100 | 176,000 | 54,300 | 34,200 | 63.0 | 19.30 | 5.97 | 3.76 | |||||||||
| Other States3 | 19 | 38 | 9 | 9 | 5 | 54.0 | 0.25 | 0.25 | 0.13 | |||||||||
| Grand total or average | 4,450 | 9,140 | 176,000 | 54,300 | 34,200 | 63.0 | 19.22 | 5.94 | 3.74 | |||||||||
| 1Data are rounded to no more than three significant digits, except "Average per worker hour, crude ore" and "Average per worker hour, usable ore;" may not | ||||||||||||||||||
| add to totals shown. | ||||||||||||||||||
| 2Does not include professional or clerical workers at mines, pelletizing plants, maintenance shops, or research lab workers. | ||||||||||||||||||
| 3Includes California and South Dakota. | ||||||||||||||||||
Source: United States Geological Survey Mineral Resources Program