There are an estimated 6.8 million IDNs (as at December 2015).
4.5 million are ccTLDs, and 2.3 million are gTLDs.
4.6 million (or 67%) are at the second level, and 2.2 million (or 33%) are at the top level.
Between December 2014-2015 the growth rate of IDNs was 9%. This compares with less than 2% growth in the previous year, 2013-2014.
New gTLDs provided the majority of IDN growth during 2015, with most of the established IDN spaces keeping level or shrinking slightly. Growth was particularly vigorous in the IDN new gTLDs (top level).