Officially, ~50%. But not only are those fees artificial, meant solely to drive up the prices, but a god portion of the other fees are simply there to, and I quote "Prove you're financially stable enough to have a child". They literally charge $20,000 so that you can prove that you can afford a kid. You can also tell because you can actually adopt a child from over seas for less than $2,000. (Depending on what country you adopt from, of course.)