OMAHA, Neb. (AP) — A report on a May survey says slower economic growth likely is ahead for nine Midwestern and Plains states.

The survey report issued Monday says the overall Mid-America Business Conditions Index dropped to 50.4 last month from 52.7 April.

Creighton University economist Ernie Goss oversees the survey, and he highlighted drops in economic activity for companies linked to energy production and agriculture.

The survey results from supply managers are compiled into a collection of indexes ranging from zero to 100. Survey organizers say any score above 50 suggests economic growth, while a score below that suggests decline.

The survey covers Arkansas, Iowa, Kansas, Minnesota, Missouri, Nebraska, North Dakota, Oklahoma and South Dakota.