Engineers, who were the leaders of the Underground Railroad, helped slaves who were running away by providing them with food, shelter, and sometimes jobs. They hid the slaves from people who were trying to catch them and return them to slavery.
The GDP per Capita, in Nigeria, when adjusted by Purchasing Power Parity is equivalent to 32 percent of the world's average.
These have given Ghana one of the highest GDP per capita in West Africa. Owing to a GDP rebasement, in 2011 Ghana became the fastest growing economy in the world. The Ghanaian domestic economy in 2012 revolved around services, which accounted for 50% of GDP and employed 28% of the work force.