I strongly disagree whith your opinion but since I m clearly outnumbered I ll accept your decision in my opinion the most information it s removed the least useful this article becomes the only opening year isn t really relevant if it s taken individually and despite being stable data they re alike questionable at least for early systems and this way even the sortability of the table becomes pointless it ll be more rational to revert the article to a mere simple list as it was before March 2013 if I correctly saw in the history Conversely the reader s usefulness of collecting statistic data in such a global list is far bigger than adding that to a nationwide continental list if you re interested in some specific system you can go directly to their individial Wiki pages while if you aim to a world overview it s somewhat tiring to search open match a handful of different article Don t take it to heart but I don t intend to further contribute to this list good luck with your project but from my personal point of view as reader user it doesn t worth the needed time and effort