Don't you use the buzzer manager tool? It works a treat and list them from rare at top down. And shows which ones you have. And you can clink on them and open their country page. Makes it easy as.
Nope I typed them all into an excel spreadsheet earlier this year.
Similar concept in that I grouped all the countries into 9 groups, with the rareist being group one (<12) and the most common (>1000) being group 9
How does one get a buzzer manager tool?