In 2009, the USDA found that 9.26 percent of New Orleans' population did not have a car, and lived more than a mile from the nearest supermarket.
Jefferson Parish has less than 2 percent of residents who fit that description, despite having a larger population.
Looking at the map, you can see that areas with comparable statistics include the Lowland South (former cotton belt), the Appalachain coal belt, and Native American reservations. New Orleans also appears to be one of a few 300,000+ population cities (in major metropolitan areas) with statistics of this nature.
It is high time to stop repeating this "Third World and Proud of It" foolishness.