The crude birth rate is the annual number of live births per 1,000 population.
Method of measurement
The crude birth rate is generally computed as a ratio. The numerator is the number of live births observed in a population during a reference period and the denominator is the number of person-years lived by the population during the same period. It is expressed as births per 1,000 population.
Method of estimation:
Data are taken from the most recent UN Population Division's "World Population Prospects".