It found that the average number of carbon monoxide deaths in the United States was greatest in the month of January.

VOA: special.2010.02.02

Global Witness says trends in the number and average size of oil discoveries has been in decline since 1965.

VOA: standard.2009.10.20

"It's a striking number, almost twice the average wage in the United States.

VOA: standard.2009.11.25