Companies in the extractive industry faced the most bribery investigations in 2019, both by the U.S. and other global authorities, according to a new corruption report.

The 10th Annual Global Enforcement Report, released Thursday by TRACE International, shows these industries—which extract oil, diamonds, gold and other precious metals—were the target of 20% of all non-U.S. corruption investigations and 19% of all U.S. probes.