How old do you think she'll live?

Around 70 dollars or so at my vet for a checkup and shot, best bet would be just to call them and ask. My Cat is going to be 19yrs in August, though he's starting to have some problems with his thyroid. I believe in human years that's around 90yrs old. lol and to think I was worried about him kickin the bucket around 7yrs Ha!