Appliance availability

I write to make the following request under the Freedom of Information Act 2000.
I would like the service to provide me with details of the Retained/On-Callfire appliances availability over the most recent 12-month period,stipulating the amount of time these appliances were ‘off the run’(unavailable) to respond to an emergency.
I would like these details to be broken down into the number of hours per month that an appliance has been unavailable on a station-by-station basis and expressed as a percentage figure.
In addition, and if possible, could the reason why the appliances were unavailable be included: i.e., lack of crew; lack of Officer in Charge; lack bof driver etc?
Any questions relating to this request please let me know.