How do country's reduce Oil Production, page-4

Thanks .... so pretty much the over supply has come about due to everyone jumping on the band wagon during high prices (from my understanding primarily US shale, but I stand to be corrected that point) and now everyone expects the likes of SA / Russia etc to drop production, can kind of understand why the are being so pig headed and keeping production up there. Would be interesting to know what %'s of production are from state run enterprises as opposed to private enterprise around the world if anyone knows. Ooops and correction I do hold not don't hold from original post. Cheers