99% seems too high. On the other hand, outright acquittals are very low in Germany, as well (as they should be).

Outright convictions for everything the prosecution charged are also not too common, but that the prosecutor deems something illegal and grave enough to charge, the court concurs by opening proceedings, and then in the trial everything falls completely apart basically only happens when the trial brings a complete surprise with it.

And most of those times the "complete surprise" is just a key witness refusing to testify or not remembering anymore (as it happens too often in domestic abuse cases).