Most active regional blocs.
<a href="//commons.wikimedia.org/wiki/User:Felipe_Menegaz" title="User:Felipe Menegaz"><b style="font-size:small;font-family:vivaldi;color:black;">Felipe Menegaz</b></a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>