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.
As of 2016, <a href=http://www.tradingeconomics.com/nigeria/population>the estimated population of the country is over 178.5 million.</a></p>. 191,983,952. Last collected in 2012 by the Nigeria National Bureau of Statistics, the total population of citizens in Nigeria was around 166.2 million people. In 2016, it is estimated to have over 178.5 million people although United Nations projections have placed the population as high as 186 million.