Without that, all these percentages are totally meaningless.
Not to mention that any "traffic engineer" can create congestion through inaction. Internet traffic is increasing. If you don't build your network at the same pace as everyone else, you will end up with overstuffed tubes. You might call that self-imposed congestion when you are a telco that owns the tubes.
This whole report looks like a total crock. Maybe they hired Arthur Andersen to do the numbers. -- with every mistake we must surely be learning
I just looked at the Ontario-Quebeck graph. It is unclear how 'congestion' is defined bsed on the graph displayed by BBR. Pipe utilization fluctuates. It is not clear what metric the graph displays. Max? Average? There is a possibility of misplaced attribution: congestion could result from an increase in the number of subscribers, not necessarily in the amount of traffic each subscriber consumes.