Understanding Page Statuses

Pages have statuses (I almost said state, but these overlap quite a bit); the percentages are just "pages with that status/total of pages in the work" (work = document; could be a 2 page letter or a 500 page book).

• transcribed percentage: A page that has been edited and any text typed into it is "transcribed". (We can't tell that it's "done" based on this, but we infer "transcribed" by the presence of any text on the page. I suspect, but @benwbrum can confirm, that we figure this out from the page versions -- or maybe we store it on the page?)
• corrected percentage: similar to transcribed, but for projects that import OCR (and in the next year or so, handwritten text recognition) to be corrected. Pages with imported text aren't corrected until the first edit is made. There's a work attribute for whether a document is an OCR correction project or not.
• reviewed percentage: Review in FromThePage is optional, so this gets confusing. There's a "reviewed" status that gets set to true when someone either unchecks the "needs review" checkbox (optional review) or "approved" (required review". Do we actually show a "% reviewed"? I think instead we show a "% needing review", which makes more sense in the optional review scenario -- pages with "needs review" set to true / total number of pages.