Dunno if you still want this but here's my save, its 34%, just after the merriweather heist. I'm too lazy to figure out which savefile it is, so there's a 100% in there too. Obviously just don't load that one unless you want to.
Edit: Ignore the filename, 29% was my guess but then I loaded the game up n checked n it's def 34%
screenshot: https://dl.dropboxusercontent.com/u/15034260/GTA5%202015-04-22%2004-38-16-94.png
https://dl.dropboxusercontent.com/u/15034260/GTA%205%20100%25%20Save%20%2B%20my%2029%25save.rar
PS: Fair warning, I used an infinite money cheat. If that bothers you you're welcome to not use my savegame (duh).