There is a rise, as far as I can tell. Nobody really wants to pay copy editors anymore.
The Chicago Manual of Style of 2003 featured this error:
“In the hundred and forty years since Antietam, the technologies of depiction have advanced to the point where our experience of a comparable horror—the more than three thousand murders that took place at the southern tip of Manhattan, at the Pentagon, and in Pennsylvania on the morning of September 11, 2001—are infinitely, and inescapably, more immediate.”
Laff.
I understand when news sources occasionally get things wrong. I don’t like it, because it’s not professional, but I understand. The Chicago Manual of Style, on the other hand, isn’t supposed to make mistakes like that.
Edit: Mistake wasn’t on the back cover.