It is fascinating that 7-9% can almost be perceived as relaxing in between ... And what a feeling of triumph when, almost at the top, after the football field, you "may" experience an almost flat 2-4% again.
A tip for newcomers to this climb:
Two of the three "correct" switchbacks, the first and the third, are right-hand turns, i.e. you drive them more or less on the inner radius, where it is even steeper. It is advisable to be prepared for this: Correct (easiest?) Gear in, possibly out of the saddle, possibly adjusting the oncoming traffic so that you drive far enough center / left.
At these points I have already seen motorized two-wheeled colleagues overturning after a desperate struggle, initiated too late between clutch, downshifting in the first and accelerating, because the ground offered no support for the boots because of the %%. Naturally, this happened almost suddenly, and luckily nothing else had happened; But nobody needs that, also and above all no cyclist anchored in the clickies.