The ACU only rates what you do while in Congress, so lifetime and career mean the same in this context.
http://www.freerepublic.com/focus/f-news/2815398/posts
You are oh, so wrong again. The ACU also rates members of Congress annually. in 1998, Newt Gingrich recieved a 100% rating. Newt later recieved the 90% lifetime after being out of Congress and having aligned himself with lesser pursuits.