OMAHA, Neb. — Figures from a survey of supply managers in nine Midwest and Plains states have risen slightly but still suggest slow or no economic growth ahead.

A report issued Thursday says the Mid-American Business Conditions index inched up to 47.8 in August from 47.6 in July.

Creighton University economist Ernie Goss oversees the survey, and he says he expects the regional economy to underperform the national economy because of the region’s heavy dependence on manufacturers linked to the weak sectors of agriculture and energy.

The survey results are compiled into a collection of indexes ranging from zero to 100. Survey organizers say any score above 50 suggests economic growth. A score below that suggests decline. The survey covers Arkansas, Iowa, Kansas, Minnesota, Missouri, Nebraska, North Dakota, Oklahoma and South Dakota.