It shows growth for sure, but it's quite inflated as well. Firstly because you're only looking at peak volume moments, and secondly, as time goes by more exchanges are added to CMC, which autmatically adds way more volume, even in case there hasn't really been that much organic growth at all.

Another thing to take in mind is that Asian exchanges are champion in faking volumes, which has been a major contributor to globally increasing trading volumes as well, and let Asian exchanges be the main price drivers of the last year(s). In other words, everything concerning volumes should be taken with a grain of salt.