Based on 8 month old data, here the idn tld in alexa 1st million:
SELECT SUBSTRING_INDEX(domain, '.', -1) AS c,COUNT(*) FROM alexainfos WHERE domain LIKE "xn--%" GROUP BY c;
c count(*)
com 306
xn--p1ai 241
net 67
tk 26
jp 18
su 13
eu 10
de 6
se 6
ua 5
gr 5
il 5
tv 4
tw 4
kz 4
cc 4
es 3
pl 3...