Why are some zip codes and census tracts missing from the Food Insecurity Index?

All zip codes and census tracts with a population of over 300 persons and report values for all inclusion variables, as reported by Claritas, are included in the Food Insecurity Index. Those with populations under 300 persons are excluded.

If you select an excluded locale, you will see the following message: "There are no index values for this selection. Please choose another."