[bunderbunder]

If you follow the handy link to the source that the article provided, you'll get some more information.

Incorrect orbits are counted as failures, and there are some additional tables that break down the failures by type. It does not look like the rocket simply not going up is counted in the statistics - I'm guessing that always represents an abort rather than a true launch attempt.

[manarth]

Incorrect orbit of a secondary payload is also included in the failure count (I was thinking of a 2012 Falcon 9 launch, where the primary payload was successful but the secondary payload didn't reach its intended orbit).