How much US$ is M.Schumacher worth?

I’ve heard different approximations on Michael’s income, have any exact figures been published? ( Including endorsements )

Is this a little too generous??

Details of his Ferrari contract are private, but printed and broadcast rumor has it that he gets paid on the order of $30 million (US) a year, with related endorsement contracts pushing that to over $50M. He is usually listed as the world’s highest-paid athlete.