11.   As prison populations have more than doubled in the last decade, the public debate over what constitutes appropriate and effective incarceration has intensified.

12.   But it is highly diagnostic of whether a population has Jewish ancestry, Goldstein said.

13.   Fewer than half the rural population have access to safe drinking water.

14.   High blood pressure is rare among Mexican Americans, even though the population has unusually high amounts of risk factors such as diabetes and obesity.

15.   In any case, he added, the general population has more positive feelings towards the West in general, and the United States in particular.

16.   It is said that about half the American population will have a brush with mental illness during their lifetime.

17.   Larger populations have more different kinds of founder mutation, though each is less common, doubtless making for the same overall burden of genetic disease, Collins said.

18.   Last year, to accommodate the new system, the government changed regional boundaries so that the major ethnic populations will have their own regions.

19.   Losing population can have a profound effect on a place.

20.   On the more sparsely populated Mexican side, Guerrero was the only town whose population had to be moved.