Get rid of the eval block and replace it with use Country. Other posts in this thread will show you how to get the location of your module into @INC so it can be loaded with a simple 'use'. Then put the following into Country.pm.

package Country;
use strict;
use base 'Exporter';
our @EXPORT = qw(%country);
our %country = (
  af => 'afghanistan',
  ao => 'angola',
  ar => 'argentina',
  at => 'austria',
  au => 'australia',
  bd => 'bangladesh',
  be => 'belgium',
  bg => 'bulgaria',
);
1;
[download]

This should get rid of your errors when using strict.

See perldoc Exporter for help on using EXPORT.