Come on, have some self respect - ya gotta put some text in your posts.
This isn't a sarcastic response, the only way I know of is to just go through last year's and this year's and tick them off.
Or you could export the pdf to a word processor package and run a compare docs but that will probably be messy.
Or, ask your secretary to do it.
You might find that many LOS get moved, not deleted.