Hi Ulitdko, I saw you wanted to add information to the wiki. I definitely encourage you, Ukrainians and the rest of the planet as a whole to join the effort. The reason for the revision was because that the data was not for membership but MERS ranking, which is the only data point accessible for all countries at all times.
You are welcome to use the wiki to start a page for the Ukrainian Mahjong Federation with the current data point for actual members as it seems that you have an accurate number for that. Senechal (talk) 11:39, 29 September 2015 (UTC)