Yeah, I know the .ie, .de, and .uk country codes are quite popular say.
The .de and .uk country codes are the most popular in europe. As for .ie cctld, popular is not a word I would associate with it. :) It has less than 40k domains due to moronic management of the .ie registry over the years. The number of Irish owned .com/net/org/info/biz domains is probably at least 150K. However the .info is doing better than .biz with Irish domain owners. The bulk of the Irish CNOib domains are in .com and this pattern is repeated in all the other European/EU countries that I have analysed.