Christians make up about the same proportion of the world's population today as they did a century ago, but there has been a momentous shift in where they live.
A sharp decline in fertility rates in the United States that started in 2008 is closely linked to the souring of the economy that began about the same time.
Births have overtaken immigration as the main driver of the dynamic growth in the U.S. Hispanic population, especially among the largest of all Hispanic groups -- Mexican-Americans.
Hispanics of Mexican, Puerto Rican and Cuban origin or descent remain the nation's three largest Hispanic country-of-origin groups, according to the 2010 U.S. Census. Despite their No. 1 status, Mexicans are not the dominant Hispanic origin group in many of the nation's metropolitan areas.
The 2010 Census counted 50.5 million Hispanics in the United States. Hispanics now account for 16.3% of the total population. Among children ages 17 and younger, there were 17.1 million Latinos in 2010, or 23.1% of this age group. Overall, racial and ethnic minorities accounted for 91.7% of the nation's growth over the decade.
The number of Hispanics counted in the 2010 Census has been larger than expected in most states for which the Census Bureau has released detailed population totals so far, with the widest gaps in states with relatively small Hispanic populations.
This statistical profile of the foreign-born population is based on Pew Hispanic Center tabulations of the Census Bureau’s 2009 American Community Survey.
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As of March 2010, 11.2 million unauthorized immigrants were living in the U.S., virtually unchanged from a year earlier and remaining well below the population's peak of 12 million in 2007. The number of unauthorized immigrants in the nation's workforce (8 million) also has not changed in the past year.
The world's Muslim population is expected to increase by about 35% in the next 20 years, rising from 1.6 billion in 2010 to 2.2 billion by 2030, according to new population projections by the Pew Research Center's Forum on Religion & Public Life. Globally, the Muslim population is forecast to grow at about twice the rate of the non-Muslim population over the next two decades.