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.
Prior to that, 1USD was exchanged between N197 to 199 naira. The USD has gained about 42 percent strength against the Nigerian currency between July 2015 to July 2016. So far in 2016, one Nigerian naira has equaled an average exchange rate of $0.005, a minimum of $0.004 and a maximum of $0.005. Experts have partly, blamed the USD consistent despise of the Nigerian naira for the unpleasant economic conditions of the West African country.