Gallup's annual survey of global emotions has unveiled that last year, Americans experienced anger, stress, and worry at levels eclipsing those observed over the past 10 years. The data is based on polling of over 150,000 people around the world, including 1,000 Americans. Americans' stress levels were significantly higher than the global average of 35 percent, leaving the U.S. tied for fourth (alongside Iran, Albania, and Sri Lanka) in Gallup's ranking of the most stressed populations around the globe. Greece came in first at 59 percent, while Tanzania and the Phillipines followed closely behind. As far as worry, the U.S. came in at 45 percent, slightly higher than the global average of 39 percent. (Mozambique has the world's most worried population with 63 percent.) And in terms of anger, although Anericans experienced the emotion at levels on par with the global average of 22 percent, this figure was still higher than in prior years. In fact, U.S. respo...