Currently, on all beta sites, the current site stats is placed prominently on the front page, which is great for knowing how the site is currently doing.
However, it doesn't say anything about the trend of the numbers - whether the site is sailing or it is sinking compared to the last month.
According to Madara Uchiha, our moderator on Anime & Manga SE, a graphical representation of the stats are available, but to moderators only.
Disregarding data which are not already public, which are hidden for a reason, I can't see any reason why we are not allowed access to graphical representation of public site statistics. In fact, there is already a third-party app that scraps the information from the home page and draws up some nice graph showing the site statistics over time.
Can we have a beautiful visualization on how our beta sites evolve over time, from pony to unicorn?
stolen borrowed from Bulbapedia