| Age (Years) | Slaves | Massachusetts, 1865 |
|---|---|---|
| 0 | 1000 | 1000 |
| 1 | 686 | 795 |
| 5 | 548 | 726 |
| 10 | 518 | 716 |
| 20 | 486 | 701 |
| 40 | 391 | 676 |
| 70 | 165 | 613 |
Sources: Robert Fogel, Without Consent or Contract:, (volume II: Evidence and Methods), p. 285 (Slave Survival); Historical Statistics of the United States, volume I, p 63 (Massachusetts, 1865).