Every body outside of the D600 that has never left the box.
Pardon me, but holy crap, this is getting ridiculous!!!
Every body that ever gets a lens put on it and used will get dust.
The D600 is the only recent Nikon with a systemic issue with a dirty sensor, and that had more to do with a bad shutter mechanism than "dust". Every other thread about it has more to do with owner panic and ignorance to what caused the D600 issue than any real problem whatsoever.
If you're looking to replace your Nikon and are worried about dirty sensors don't get a D600. Otherwise, whatever you get you can expect similar sensor cleanliness to that of your current camera. Just how good that is depends on personal cleanliness habits and how you use your camera, and probably nothing else.