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Forty percent of African-born blacks arrived in the U.S. between 2000 and 2005. More...

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(August 2005) PRB staff are often asked how to interpret PRB's annual World Population Data Sheet and about current population trends. We asnwer some of the questions we are frequently asked by educators, journalists, and others interested in population dynamics. Some of these questions are:

• Has world population growth slowed? Is the population declining?
• How is the population growth rate calculated?
• How reliable are population projections to 2025 or 2050?
• Do projections take AIDS into account? Isn't AIDS causing Africa's population to decline?
• Why is the two-child family average so important?