Seems nobody ever got a 99, or they did and are too modest to say.
Have you ever did a game with 99% accuracy?

Sorry, it says 100 when I read it. Only 99's are supposed to count on this (admittedly silly) thread https://www.chess.com/analysis/game/live/93055290401?tab=review

Of course, but 100's are a dime a dozen, even for me.
I cannot recall a 99 ever, but maybe there is one lurking somewhere.

My game was originally assessed (years ago) at 99.4%. The most recent engine upgrades dropped that estimate first to 98.9%, then to 97.2%.
A Heroic Defense in the Sicilian Najdorf - Kids, don't try this at home! - Chess Forums - Chess.com
Hoping to get more responses than the 100%'er, 'cos it happens more often.