You would have to create as any text boxes as you need and hide all except for those that should be displayed at any one time. The problem will be that they will not 'float' to the top when you select the country, so you will have gaps, which may look odd. So you would probably need some sort of dynamic expression in the text boxes. You have not explained what you want to display in each box, so I cannot be specific, but perhaps something like this:
=If(GetSelectedCount(Country) >= 1, SumField(GetFieldSelections(Country, '|', 20), '|', 2))
=If(GetSelectedCount(Country) >= 2, SumField(GetFieldSelections(Country, '|', 20), '|', 2))
It might be simpler to use a different visualisation such as a straight table.