OMAHA, Neb. (AP) — Figures have plunged in a fourth straight monthly survey of supply managers in nine Midwest and Plains states, providing more evidence of a slowdown in the region's economy.

A report issued Tuesday says the overall Mid-American Business Conditions Index dropped to 40.7 last month from 41.9 in October, 47.7 in September and 49.6 in August.

Creighton University economist Ernie Goss oversees the survey, and he again cites the strong U.S. dollar among the reasons for the region's economic slide.

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.

Copyright 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

More From KXRB