Interesting question. I can only speak for the one I work in (Presbyterian Support home), of 30 permanent residents. Our oldest resident is 103 and has been there for 4-5 years I believe. Our youngest is 69 (note that’s 34 years difference between youngest and oldest!). The youngest residents could very possibly be with us for another 10 years at least. On the flip side, in the 16 months I have been there, 8 residents have died in the rest home, and another 4 have died after moving to either hospital or dementia level care. Sometimes we feel a particular resident doesn’t have long left, but they surprise us and are still with us a year later. Other times a resident dies completely unexpectedly.
I found this article from 2017, which sheds some light on the subject, and is quite interesting. Particularly interesting to see the length of stay for different geographical regions.
https://www.stuff.co.nz/national/hea...-just-17-years