That's an interesting way to look at it, and I see your point about some draft years being better than others. On the other hand, measuring success only by number of NHL players does not provide a complete picture. For example, the Bruins drafted fewer NHL players than we did (4) -- but those players were Sobotka, Kessel, Lucic and Marchand! And while Kessel was #5 overall, they still managed to find Lucic in the 2nd round, Marchand in the 3rd round, and Sobotka in the 4th round.
Also true -- there are a few teams in that timeline who did very well for themselves like Boston, Colorado and Montreal with a number of solid to excellent contributors in their numbers. Quantity and quality combined. And a few, who, even with high end picks, stunk the joint out.
It is the mark of an educated mind to be able to entertain a thought without accepting it. - Aristotle