Sail panel emblems on a vinyl top Dart

So, I was in a discussion at the garage tonight, and im curious as to whether anyone can help me with this question.. I know on 67, 69, and 69 Darts I have seen the 'Dodge Emblem' on the sail panels of the vinyl top Darts.. I was under the assumption that 69 was the last year for that.. but my one friend argued that you could still get that up to 72.. I personally have never seen a 70 and up Dart with those emblems on the sail panels... (at least none that I can remember) .. Can anyone tell me exactly when they dropped that from the Darts with vinyl tops?