Depends, in Britain and Europe they seem to live longer than in the US, because they have a much smaller gene pool over there and neuter them too early in life. Most of mine have lived until 8-9 years old, they can live older, in the US it seems more like 7 year or so. Sadly because they are being bred more as pets than working animals these days in the UK, they are being bred for fancy colours and coat types which will inevitably bring genetic disease through inbreeding, but currently they are quite healthy animals fortunately.

Mine are called Pyewacket, Fitch, Kali and Socks :)