| Key Performance Indicators | 2008 | 2009 | 2010 | 2011 |
| Number of Lost Time Accidents (injuries and illnesses)/100,000 hours worked - group LTA | 1.82 | 1.53 | 1.72 | 1.44 |
| Working Days Lost because of Lost Time Accidents/100,000 hours worked - group WDL | n/a | 39.66 | 45.63 | 36.16 |