109ANNUAL AND CORPORATE RESPONSIBILITY REPORT 2015

Operating Environment Indicators

2015 2014 (Restated)*

2013 2012 2011

Brent crude ($ / Barrel) 52.46 99.00 108.70 111.60 111.27

Exchange rate ($ / ) 1.110 1.329 1.328 1.285 1.392

Return on Assets

ONP (adjusted) 650.6 511.6 396.3 581.9 458.5

Adjusted capital invested current year 11,233 11,003 7,044 7,583 8,141

Adjusted capital invested previous year 11,033 7,044 7,583 8,141 7,146

ROA 5.85% 5.67% 5.42% 16.29% 6.00%

* Financial year 2014 has been restated for comparison purposes with financial year 2015.