Almost 60 percent of countries are at high risk of using slave labour in their supply chains, according to a new global index...which also ranked North Korea as having the worst record of slave labour in the world. By assessing incidents of human trafficking or slavery, national laws, and the quality of law enforcement across 198 countries, risk analytics company Verisk Maplecroft found that 115 countries were at high or extreme risk of using slaves. "Few countries in the world are actually immune to modern slavery," said Alex Channer, lead analyst for human rights research at Verisk Maplecroft...Channer said Verisk Maplecroft's index aims to help businesses identify countries most at risk of slave labour...After North Korea, the report ranked South Sudan, Sudan and Democratic Republic of Congo (DRC), one of the world's largest producer of cobalt which is used in electronics, as countries with the most slave labour.