Out of an estimated 30 million slaves worldwide, nearly half of them are in India, while Mauritania, Haiti and Pakistan rank among the countries with the highest prevalence of modern slavery, a new report from an anti-slavery charity says.

The “Global Slavery Index” report released by the Walk Free Foundation on Thursday ranked 162 countries by estimating the number of people in each nation affected by a range of practices including forced and bonded labor, human trafficking, forced marriages, and the use of children in the military.

Walk Free Foundation was founded last year by Australian mining magnate Andrew Forrest. Its index was endorsed by leaders including former U.S. Secretary Hillary Clinton, former British Prime Minister Tony Blair and Microsoft Corp. co-founder Bill Gates.

In the report, India has the highest number of estimated slaves with 13.9 million, followed by China with 2.9 million and Pakistan with 2.1 million. . .