Home nursing / care giver fee?

I need to find an official statement of how much a nurse or care giver costs per day (This is for in-home care).
After my accident, my woman had to care for me daily for a month. We need to provide proof of how much it would have cost to employ a nurse for this period of time. The court demands an official document or information regarding this.
Please, if you can, point me to websites or anything with this kind of information. It is greatly appreciated.