The Global Slavery Index has released its finding for 2016. It estimates that there are around 45.8 million people currently living in some form of modern day slavery, with 5 countries accounting for roughly 58% of those in servitude.

Those 5 nations, in descending order of total slave population, are India, China, Pakistan, Bangladesh and Uzbekistan. India has by far the worst record, with a population of more than 1.3 billion it has over 18.3 million people in some form of servitude. China, by comparison, also has a population of around 1.3 billion people but only has a slave population of roughly 3.4 million.

North Korea, however, has the highest rate of servitude. With a total population of 25,155,000 it has 1.1 million people living as slaves, that is roughly 4.3% of it population. North Korea’s proportion is so high because of government-sanctioned labour camps, as well as female nationals being forced into marriages and being sold into the commercial sex trade.

The index also ranked the 161 nations that were included in this year’s slavery index on the strength of their response, using a system which uses 92 indicators of good practice.

The Netherlands, The US and The UK have the strongest responses to modern slavery, primarily because they have the resources to do so. The Philippines, Brazil and Georgia are also considered to have strong responses to slavery, despite having fewer resources to spare.

The Global slavery index determined their totals by working in conjunction with Gallup Int. Since 2014 they had conducted 25 surveys, interviewing 28,000 individuals in 42 languages. These numbers were increased this year to 42,000 individuals in 53 languages, after they conducted state-level surveys in India.

The report considers slavery to be “human trafficking, forced labour, debt bondage, forced or servile marriage or commercial sexual exploitation”