OMAHA, Neb. — A monthly survey of business supply managers shows improvement but still reflects relatively weak economic conditions in nine Midwest and Plains states.

The Mid-America Business Conditions Index report released today said the overall economic index for the region rose to 46.5 in November from 43.8 in October.

Creighton University economist Ernie Goss oversees the survey, and he said he expects the overall regional economy will continue to underperform the national economy because of the region’s dependence on agriculture and energy.

The survey results are compiled into a collection of indexes ranging from zero to 100. Any score above 50 suggests growth. A score below that suggests decline.

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