The higher the category, the less confirmed

I just want to understand this for everyone? The higher the category, the less confirmation 30 days.
I understand if there were no downloads from 1-2 categories. So there are much more of them than in 5. But at the same time, a large amount of traffic from the 5th category was approved, up to 90 percent. While the first categories are very few.
And it can be seen in all months.
March


January (for example yet)