As the calendar chart at left shows, CGs suddenly clustered on the 23rd and the 30th (this past Monday, in fact).
There were three on the 23rd. Not to be outdone, the 30th conjured up four CGs--the first time in 2016 that this has happened.

There were 20 CGs in May. If we get that same number in June through September, we will wind up with 106 CG--which will mean that we'll still be stuck with triple figures for awhile longer.