There are 186,817 people residing in São Tomé and Príncipe according to a 2013 estimate published in the CIA World Factbook.
[2] São Tomé was discovered in the 1470s by Portuguese explorers and subsequently became a slave port.
When slavery was abolished in 1875, contract labor from Angola, Mozambique, Cape Verde and other parts of the Portuguese empire were recruited.
The children of these contract laborers who were born on the island nation are called "tongas".
On the island of Príncipe, serviçais and tongas have settled permanently on government-allotted land.