This map shows population change between 1990 and 1999 in the over 115 counties within the Mississippi Alluvial Valley (MAV). Click on the map to display attributes   (State, County, FIPS-Federal information processing standards codes used to identify a geographical area, Numeric and Percent of Change) for each county.  Only about 10 counties have a population growth rate at or above the U.S. average. Therefore, about 105 counties witnessed population declines. The U.S. population change average was 9.6%. Click on the legend for MAV population change relative to the U.S. average.