Care to expand on that?
"International Credit Card" are a small fraction of the total -- under 5%. The vast majority of transactions by number and value are by debit card.
(The national/international distinction is between Dankort, the Danish card payment system only used on most debit cards here, and the foreign companies like Visa and MasterCard.)
(For international readers, in Denmark, unlike Germany, the national debit card can be combined with a credit card on one card and then the terminal just chooses automatically)