According to the U.S. Customs and Border Protection, nearly 90 percent of all undocumented Cubans who enter the United States now come through Mexico rather then reaching the U.S. by boat. Migrants pay smugglers up to $10,000 to cross the Yucatan Channel into Mexico and then travel up to the U.S. Border.
Source: Will Weissert, AP, ” Fleeing Cubans Reach U.S. Through Mexico,” Guardian, August 1, 2007.