The “Total Nobel Prizes” shown for a given country may differ from the sum of that country’s prizes in the individual categories. Possible reasons for this mismatch include the following:
Varying criteria for attribution, such as counting laureates with multiple affiliations in more than one country or category.
Some sources may include or exclude organizational Peace Prize winners or count shared prizes differently.
Changes in political boundaries, with laureates from countries that later dissolved (e.g., Yugoslavia, USSR) being reassigned to successor states or grouped differently.
Some sources include all prizes awarded, including those that were declined, while other sources exclude declined awards from their totals.