Pretty much spot on, 22.5%.
11.1% of the games have a sensitivity that is either based on power, logarithm, e or changes formula based on the sensitivity value.
Around 60% has either a precision of 2 decimals or better, or a somewhat acceptable range (over 200 steps).
Slightly less than 30% have some kind of zoom sensitivity, but I don't have a way to filter out games where this isn't applicable.
And slightly less than 10% have some kind of acceleration, polling rate or smoothing issue mentioned in the notes. There's likely a bit more where it isn't mentioned, and remember that at least 60 games are in the "Unsupported" category because of either acceleration/smoothing or completely lacking a numerical sensitivity or even notches on the slider.
The most common is probably MDH 100% (based on the games FOV type).