Institute graphs report unused space

In Karaage 2.x institute pie charts reported total usage
possible, including unused usage.

In Karaage 3, 100% reflected 100% of the usage used, not
100% of the usage possible.

This is considered a regression, and now rectified.

Change-Id: I482ac242a0a9231de85f4c68a674cb2554e4b8b8