33) Other information

Research and development costs incurred by the Group in 2014 amounted to $1,353 million ($1,260 million in 2013 and $1,034 million in 2012), corresponding to 0.57% of the sales.

The staff dedicated in 2014 to these research and development activities are estimated at 4,840 people (4,684 in 2013 and 4,110 in 2012).