BOGOTA, Colombia (AP) — A United Nations report said Wednesday that cultivation of the plant used to make cocaine has reached an all-time high in Colombia, adding pressure on President Ivan Duque to resume an aerial spraying program suspended by his predecessor over health concerns.

Annual data released by the U.N. indicates Colombian coca cultivation increased 17 percent to 171,000 hectares (660 square miles) in 2017. This could mean cocaine production grew by an estimated 31 percent to 1,379 metric tons.

The findings, based on satellite imagery and on-the-ground verification, track with thos...