Very interesting percentages.
I think its very important to know when the community was created.
In my case, for example, first topic = August 2015. 
@HAWK 's case view like this:
If someone want to see their pie chart with percentages, go to admin section and take the trust levels numbers to put here: https://playground.anychart.com/DbRkhpaG/2 on this section:
And click “Run”, and you will have your Pie Chart 