In the graphs below I have excluded 2024 - we're in January, the stats for such short period are not comparable with previous years. (But the queries can be used for any period)
And this query shows percentages rather than absolute numbers.
Another outcome, which can IMO be considered a success is when the migrated question was closed as a duplicated. After all, this means that the OP was directed to a place where their question is already answered. Here is a query where also duplicate closures are included.
And again, a query showing percentages rather than counts.