The exact amount is not mentioned in the Integrated report, Sustainable development report, or the Annual financial statements for 2015.

The annual financial statements do however, indicate that the company has set aside an amount of $683M for environmental rehabilitation obligations (Page 34)

The environmental rehabilitation balance in the AFS does show year on year movement in the provision account and the balancing figure could be the expenditure incurred during the period. However it would be difficult to indicate that as the solution as the indicator encompasses many other things.