Just how tough is it to reach the NHL?

It has been well-documented that when Little Johnny begins his minor hockey career, his family has a better chance of winning the Powerball or 6-49 lotteries than he does of becoming an NHL player. Let's fast forward to about a decade later, then. By this time, Little Johnny has become an elite player in his age group and he's either playing major junior or college hockey or he's attracting some serious interest from one or both of them. Well now, you'd think, the odds of him cashing in on a ...