Country population rate of natural increase (RNI) and rank for world countries for the year 1966
| Rank | Country | Rate of Natural Increase | Population |
|---|---|---|---|
| 1 | Bhutan | 2.892 | 265,437 |
| 2 | Nigeria | 2.842 | 49,530,416 |
| 3 | Cambodia | 2.642 | 6,779,482 |
| 4 | Djibouti | 2.417 | 148,826 |
| 5 | Guinea | 1.904 | 3,351,686 |
Data from US Census International Database