[['rank', 'nation', 'gold', 'silver', 'bronze', 'total'], ['1', 'brazil', '17', '18', '15', '50'], ['2', 'united states', '5', '5', '4', '14'], ['3', 'china', '4', '5', '5', '14'], ['4', 'germany', '2', '1', '3', '6'], ['5', 'switzerland', '1', '0', '0', '1'], ['6', 'netherlands', '0', '0', '1', '1'], ['6', 'norway', '0', '0', '1', '1']]
2 country have zero Gold medal
2 country have zero [ENT] medal