ALF supply/demand trends

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Hi,

May I pls know if there's a way to find out the supply/demand trends for residential assisted living facility (RALF) in a particular city or cities in US. I looked at Genworth and figured out the cities where there's a positive trend in the ALF care costs but couldn't figure out what's the supply and demand for ALF in a particular state/city. I tried doing a google but didn't find anything much helpful. 

rgds

Kishore