It shows that most clubs when they go through a period where they are one of the 'good teams', will usually earn a flag somewhere in there. It might not be the year they finish top 2, but that period of success earns them a flag at some point in there. With one really obvious stand out exception.
Our problem is that even when we've been "one of the good teams", we've never been one for very long. Realistically, it's probably 97-98, 05-06 and 17. There was the occasional one-off prelim in there (93, 02 and 12), but when you're only ever actually up there for 1 or 2 years at a time before collapsing in a heap, then you don't really have a "period of success" in which to win a flag. You either win it this year or come back and try again 5 years later with a different list and a different coach.