Alphabetic country code to identify the survey from which the data were collected. The code is based on an international standard code. This variable is now 3 characters in length, with the third character indicating the format of the recode file used for this survey. For all surveys in DHS III this code will be 3. For example: CI3 is Côte d'Ivoire, BD3 is Bangladesh, ZW3 is Zimbabwe, and ID3 is Indonesia.