More general areas included are what percentage of the population voted and how many trust Parliament, the state of the economy and the environment - the latter measured in part using greenhouse gas emissions and air pollutants.

BBC: Ten signs of happiness published by ONS

Anybody got any idea the population of Australia, how many people? (Laughter.) Just a guess.

WHITEHOUSE: President Obama & Prime Minister Gillard Visit Wakefield High School | The White House

Mr. ANTOS: How many votes are there in the Medicare population?

NPR: Democrats to Push for Medicare Changes

Jersey's population could be capped as the government reviews how many people can live and work on the island.

BBC: Cap on Jersey population possible says minister

Jung's analysis, written in 1945, of how best to get the German population to accept defeat was read by many, including General Eisenhower.

ECONOMIST: Carl Gustav Jung

"Considering the number of patients who are aging and how many more we are going to see, we have to look for the barriers this population encounters and what we can do to help them overcome them, " says lead author Medha Munshi, who served on the consensus panel and heads Joslin's Geriatric Diabetes Clinic.

WSJ: Diabetes Care for the Elderly Focuses on Simpler Medication, More Home Monitoring

The McDonald's spokeswoman said the company knows of franchisees in seasonal or low-population areas that use guest workers but said the company doesn't know how many workers are recruited each year overall.

WSJ: Guest Worker Visa Troubles Visit McDonald's

Mortality rates are calculated by examining how many people would be expected to die, taking into account age and disease profile of the local population.

BBC: Lincolnshire hospitals welcome death rate probe

Along the border region, locals' guesses of how many people engage in at least some shuttle-trading range from a fifth to half of the population.

ECONOMIST: Russia's western border