The Crude Birth Rate (CBR) measures the number of live births occurring in a population during a given year, per 1,000 population. The formula is:
$ CBR = \frac{Number \ of \ live \ births}{Total \ mid-year \ population} \times 1000 $
A higher CBR indicates a faster growing population, while a lower CBR suggests slower growth or population decline.
To determine which country had the highest CBR in 2020 according to World Bank data, we need to compare the rates for Egypt, Niger, China, and Lesotho.
Based on World Bank data (or closest available estimates for 2020):
| Country | Estimated CBR (per 1000 population, 2020) |
| Niger | ~47.0 |
| Lesotho | ~31.7 |
| Egypt | ~27.8 |
| China | ~8.5 |
The data clearly shows significant variation among these nations.
Therefore, Niger had the highest Crude Birth Rate in 2020.
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