Calculate the annual rate of natural increase of a population(r) from the following data: the population has 1000 individuals, a birth rate of 60 per year and a death rate of 10 per year.

The annual rate of natural increase (r) can be calculated using the following formula:

\[ r = \left( \frac{{\text{Births} - \text{Deaths}}}{{\text{Population}}} \right) \times 1000 \]

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