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| TABLE 4 | |||||||||
| PHOSPHATE ROCK SOLD OR USED BY PRODUCERS IN THE UNITED STATES, BY PERIOD1 | |||||||||
| (Thousand metric tons and thousand dollars) | |||||||||
| P2O5 | |||||||||
| Period� | Rock | content | Value2 | ||||||
| 2006: | |||||||||
| January-June | 14,900 | 4,300 | 443,000 | ||||||
| July-December | 15,300 | 4,400 | 479,000 | ||||||
| Total | 30,200 | 8,710 | 922,000 | ||||||
| 2007: | |||||||||
| January-June | 15,000 | 4,270 | 722,000 | ||||||
| July-December | 16,100 | 4,620 | 877,000 | ||||||
| Total | 31,100 | 8,890 | 1,600,000 | ||||||
| 1Data are rounded to no more than three significant digits; may not add to totals shown.� | |||||||||
| 2Free on board mine. | |||||||||
Source: United States Geological Survey Mineral Resources Program