Is this just to remove the duplicate records or do you need to retain the duplicate records when you are done?
There's knowledgebase article that describes deleting duplicates you can look up for that. http://help.filemaker.com/app/answers/detail/a_id/3441/kw/duplicate
If you don't want to delete the duplicates, there are several simple "brute force" methods you can use to populate Table 2.
Define your fields in Table 2. If it's a duplicate of Table 1, you can use FileMaker advanced to copy and paste Table 1. In Regular filemaker, you can find just one Record in Table 1, then Use Import Records with the New Table option to import it into a new table that duplicates all the fields of Table 1. Either way, then open Manage | Database | Fields, find Table 2, Double click the country field and specify Unique Values, validate always on the Validation tab. Now Show all records in Table 1 and use Import records to import all the records into table 2. The Unique values validation rule will filter out the duplicates during the import.