Walking tops the list. A two thousand six report from the C.D.C.found that more than seventy-nine million Americans walk to stay physically fit.

VOA: special.2010.06.08

Most of the words come from a vocabulary list that gets updated about every ten years.

VOA: special.2009.04.06

That is,until this year, when fans were allowed to vote for their five favorite songs from a list of 100 titles.

VOA: standard.2009.12.18