Plugin suggestion for country selection

We’re running an international conference with costs based on the attendee’s country according to the world bank indicators. So 3 tiers of ticket prices: high-, middle-, low-income

I want users to select their country from a drop down list and for it to tell them which income bracket their country is.

Is there a simple plugin or tool I could use to set this up on our wordpress website?
Ideally reading from a spreadsheet so I don’t have to manually enter all 200+ country tiers?
I don’t want the spreadsheet to be visible on the front end.

I’m not very confident with databases or programming so the simpler the better!

 

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