Some suggestions: 1) To using ISO 3166 3-character country code becasuse is more readable. http://en.wikipedia.org/wiki/ISO_3166-1 For any person it's easier to identify a country by the code of 3-letters that by the one of 2-letters. 2) Columns separated by another character different of a tab, as ':'. So it's more readable for humans and too for the machines. And so it's easier to maintain that table. I comment you these suggestions because I have something of experience with this type of tables as you can see here: http://webda.python-hosting.com/browser/trunk/data Greetings!