>>96904039
Most vampires?
I would guess half die in their first year. Of course this is because Sabbat screws the scales a bit but even in Camarilla I would guess a decade.
Those who survive a decade would be halved every century until like their 400s and then they will survive a lot longer since they are powerful enough that realistically they can survive most things if they are not stupid.

But if you are asking about the upper limits? They are ageless and Antediluvians are like 15.000+ years old. (And that's just pure VTM sources) Vasilisa is his child and it is also at least 14.000 years old.