I probably read/listen for 1 hour each weekday and about 2 hours each day on the weekend.
200 would require around 30-40 hours of reading time per week, so it's possible I suppose, but unlikely.
I know it will depend on the book, if it's a book to entertain or a technical book... but sometimes I get the feeling that so little is retained it's almost unproductive in the long term simply because you will forget a lot of it.
I have books that stuck with me, that changed my perception, but those are a really small fraction, and probably had to re-read them to get some details if I wanted to talk about that book to someone for example.
Do you take notes? If so, do you revisit those notes?
A few years ago i started takin serious notes, using memory palaces and other stuff to try help to remember more but it made reading a lot less enjoyable, so i stopped.
These days I tell my better half or a friend or a work colleague about the interesting things i read and that is a good balance between remembering and enjoying reading.