the easiest way to achieve this is with a pivot table. If you want to group by continent, rather than by country, then your data must show the continent, too. Excel does not know that Argentina is in South America.
Also, you need to watch your data quality. Permanemt/Permanent: Excel will see these as two different values.
To get started with Pivot tables, see http://peltiertech.com/Excel/Pivots/pivotstart.htm
See attached file for a pivot table on your data.
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