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.
The Gross Domestic Product per capita in the United States was last recorded at 53272.50 US dollars in 2016, when adjusted by purchasing power parity (PPP). The GDP per Capita, in the United States, when adjusted by Purchasing Power Parity is equivalent to 300 percent of the world's average. GDP per capita PPP in the United States averaged 45939.84 USD from 1990 until 2016, reaching an all time high of 53272.50 USD in 2016 and a record low of 36543.08 USD in 1991. 1  Historical. 2  Forecast. 3  Alerts. 4  Data. 5  API.