Definition: The amount of time for a given population to double, based on the annual growth rate. To determine doubling time, divide the growth rate as a percentage into 70. i.e., a growth rate of 3.5 represents a doubling time of 20 years.
Examples:
Afghanistan has a current growth rate of 4.8%, representing a doubling time of approximately 14.5 years (70/4.8=14.5).
