A car drives past a billboard in Havana in 2006 that reads in Spanish "70 percent of Cubans have been born under the embargo." Cuba updates its estimate of how much the embargo has cost it using a complicated - and some say flawed - calculus. (Associated Press)

A car drives past a billboard in Havana in 2006 that reads in Spanish "70 percent of Cubans have been born under the embargo." Cuba updates its estimate of how much the embargo has cost it using a complicated - and some say flawed - calculus. (Associated Press)