It’s a nice enough overview, and parting from that chart, it may be interested for some people to customize it for their local board and add a history to it.
The chart does provide a clear view of the number of, let’s say, heavy local posters, which are probably fairly structural to the local boards’s activity, both in terms of generated content and as a kind of guidance for others on the local boards themselves. A few boards are well off with these in terms of numbers, whilst others are rather much on the low-end.

One thing I’d emphasize on, is on the lower end of the chart (those with a few posts). Whilst these are the largest group by far on each local board, it may give a false sense of there being plenty of newcomer accounts that potentially will stay for the ride. The truth is, at least on the Spanish local board, that I barely actually see them at all, meaning that many of the likely post in the Altcoin board and/or spam something once in a lifetime, and/or got banned/nuked (the post count will still count their posts).

What I mean by this is that I’m often going on about how my local board is extremely scarce on newbies (in accordance to the potential of the language), and whilst my perception is a consensus amongst the usuals, the numbers on the lower segment (228 on the Spanish board) suggest that there is a potential that does not stay for the ride. My perception is that the intent was not really of staying at all for the most.