* The latest industry data available from the U.S. Bureau of Labor Statistics are for 2009.
* A process safety event is any unintentional release or uncontrolled reaction including a fire or a release of energy involving a highly hazardous chemical in the workplace that resulted in a serious injury to an employee and/or contractor; an off site impact; or property damage that exceeded $25,000.
+ Includes offices, chemical plants, refineries and fuel and asphalt terminals.
* Includes partial-year performance for plants acquired in August and November.
** Industry average for manufacturing sector, the category in which refineries, chemical plants and terminals are assigned by the U.S. Bureau of Labor Statistics.