• Gold Fields average operating margin for 2014 was 9.15%, a 80.93% increase from 2013.
• Gold Fields average operating margin for 2013 was 47.97%, a 32.84% decline from 2012.
• Gold Fields average operating margin for 2012 was 36.11%, a 28.32% increase from 2011.

Operating margin can be defined as operating margin measurement of what proportion of a company's revenue is left over after paying for variable costs of production such as wages, raw materials, etc.