I have results somewhere, but basically 7 & 9 is maybe worth 13 cents. All other numbers worth less than a dime.
I know books charge more and people will say they are worth more. But like the -3 line in football, results speak for themselves. While it isn't as fine a determination, it is one that can be determined through results.
Again I am only looking at my sources and the pushes they had. Not factoring those places that had 8.5/9.5 or 7.5/6.5 respectively. The reason it is worth less in my book is because a push isn't a loss. so all pushes carry less weight than buying off and getting a win.