EndangeredSpecies
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Issue is growth rate of 2% is also calculated based on historical data and changes from time to time. Unless you repeat your measurement you are likely to make mistake over there. Now growth rate is Exponentally related to your population so a change of 2% to 2.5 or 3% for a period of 20 years will produce very large deviation.Its calculated based on population of 200 million. Pakistan have a population growth rate of about 2% and in the 1998 census the population estimate was about 135 million
With 2% growth in 18 years its likely to be 192 million although most agencies calculate Pakistan of about 190 to 200 million
Take an example
(1.02) ^ 20 is 1.49
(1.03) ^ 20 is 1.81
Difference in population for a starting of 135 million will be
135 * ( 1.81 - 1.49) = 43 million.
That is no a small error!
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