Migrants account for 3.5 percent of the world's population today, compared with 2.8 percent in 2000, according to the report prepared by the population division of the UN Department of Economic and Social Affairs.
Neither candidate has ever held political office but they beat out two prime ministers and the candidate for the moderate religious party Ennahdha.
Faced with a loss of leverage after elections or jail for opposing it, Algerians feel the country is not ready for elections.
The boat sank 10 kilometres from the coastline near the city of Sfax, a member of the coastguard said. Rescue operations are continuing.
Tunisia is the only Arab country to have emerged with a viable civil society and democracy after the Arab Spring, but the system is on the ropes as authoritarianism casts its shadow over the country.
Kais Saied, a law professor, and Nabil Karoui, a media mogul, will face off in the October runoff election according to an exit poll by Sigma Conseil.
Tunisians cast votes in a highly competitive presidential election to punish the political elite amid widespread discontent at economic hardship eight years into the 2011 revolution.
Independent candidate Kais Saied and party of jailed media magnate Nabil Karoui claim to have won first round of presidential election marred by poor voter turnout of 45 percent.
Announcement of polls by interim President Abdelkader Bensalah comes after army chief General Ahmed Gaid Salah, seen as Algeria's strongman since the fall of former leader Abdelaziz Bouteflika, insisted that polls be held by the end of 2019.
Sunday's election may push parties to stake out harder positions in the October parliamentary elections against sharing power with ideological opponents.
A group of 98 people in total, including 52 children were evacuated from countries such as Ethiopia, Somalia and Sudan. The refugees had been held in detention in Libya.
Nothing is certain in Tunisia's presidential election, only the second since the 'Arab Spring'.
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