Show the percentage of lines in the latest revision of a git repository by committer?

Is there a command or tool to show the percentage of lines in the latest revision of a git repository by commit开发者_开发技巧ter? Mostly out of intellectual curiosity, but it may be useful for something sooner or later...

Update: It looks like this question/answer gets me 95% there - it returns the line count, how can I turn that into percentages?

Look at git help shortlog, it should put you close enough to what you want.