31 Dec 2015 43 10 year trends 45 Glossary 47 Explanatory notes to the financial analysis 49 Key contributors to Mine 50 Contacting PwC PwC 39 s Mine 2016 2 Gold Nickel Copper Iron ore Coal May 15 Mar 15 Jan 15 Jul 15 Sep 15 Nov 15 Jan 16 Mar 16 Source The World Bank Global mining indices nbsp