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| Sample | Mean (SD) |
| Highest regular frequency (times per month) | 3.5 (2.9) |
| Highest amount in a 12-h period (peak; grams) | 1.30 (0.82) |
| Monthly grams | 2.15 (1.18) |
| Lifetime exposure grams | 270 (193) |
| Monthly money cocaine (Euro) | 107.5 (58.9) |
