SBF and others who have asked:
I mentioned in an earlier post on this thread that some stats are available for each country on jw.org. The stats are limited to peak publishers and total congregations for each country where JWs are legally recognised (that is, banned individual countries are not included).
Go to jw.org under section in report entitled “Jehovah’s Witnesses around the world”. It provides links to countries - click and get peak publishers and number of congregations for 2016 - strangely they have not included the results for 2017 for individual countries.