By the Numbers

50,000

Number of New Orleans homes, 27 percent, that remain vacant five years after Hurricane Katrina

100,000

Number of the city’s residents who didn’t return after Hurricane Katrina

25

Percent drop in the population of New Orleans since Hurricane Katrina

16,047

Number of homicides in Venezuela in 2009

16,272

Number of homicides in the United States in 2008

4,644

Civilian deaths from violence in Iraq in 2009

303

Number of people shot in Chicago in July; 33 died

141

Miles of marked, on-street bike lanes in Chicago

12,000

Number of public bike racks in Chicago

Sources: http://www.disastercenter.com; National Geographic Traveler; Iraq Body Count; New York Times