The projection of the World population from 1995 to 2100 is made up of 2 assumptions. First, the U. S. Census Bureau (1996) has made projections to the year 2050. These assumptions rely on the prediction that the net growth rate of population world-wide will drop from over 1.4%/y now to ~ 0.5%/y in 2050. The next assumption is that the world wide population growth rate (net of the births minus deaths) will fall linearly to zero from 2050 to 2100. The result of these simple assumptions is that the World population will asymptote out at ~ 10.6 billion people in 2100.
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