Wireless Network Utilization
This report shows the overall network utilization based on the aggregated port utilization of all controllers in your network. These statistics can help identify current network performance and help with capacity planning for future scalability needs.
Note Average utilization (%) is the percentage of utilization where utilization is calculated as ((Tx+Rx)/bandwidth).
Source: http://www.cisco.com/c/en/us/td/docs/net_mgmt/prime/infrastructure/2-0/user/guide/prime_infra_ug/reps.html#pgfId-1060053