In all, analysts in the Office to Monitor and Combat Trafficking in Persons – or J/TIP, as it’s known within the U.S. government — disagreed with U.S. diplomatic bureaus on ratings for 17 countries, the sources said.

The analysts, who are specialists in assessing efforts to combat modern slavery – such as the illegal trade in humans for forced labor or prostitution – won only three of those disputes, the worst ratio in the 15-year history of the unit, according to the sources.

As a result, not only Malaysia, Cuba and China, but countries such as India, Uzbekistan and Mexico, wound up with better grades than the State Department’s human-rights experts wanted to give them, the sources said. (Graphic looking at some of the key decisions here: reut.rs/1gF2Wz5)

Of the three disputes J/TIP won, the most prominent was Thailand, which has faced scrutiny over forced labor at sea and the trafficking of Rohingya Muslims through its southern jungles. Diplomats had sought to upgrade it to so-called “Tier 2 Watch List” status. It remains on “Tier 3” – the rating for countries with the worst human-trafficking records.