Donut chart

Arcs with a value follow each other around the ring, so a donut chart is just your data in order.

How it's built

Each room is an <o-arc value>. Values are shares of 100 (or of max), and each arc starts where the one before it ends.
One ring on lane 8, four lanes thick, leaves room in the middle for the total. --o-gap: 2 draws the thin line between segments.
The shares are satellites on the same lane, turned with angle-N to the middle of their arc: the running total before it plus half its own share, times 3.6.
Switching weeks only rewrites the values, a little at a time; Orbit restacks the arcs on every frame.