The US Bureau of Labor Statistics (BLS) first began to compile its Census of Fatal Occupational Injuries (CFOI) in 1992. This actual count of on-the-job injuries and illnesses has since been accepted by the National Safety Council as the definitive census of occupational injuries in the US. Each fatality is verified by at least two authoritative sources such as death certificates, police reports, newspaper articles, etc. In addition, the BLS also estimates the annual number of nonfatal injuries to US workers through its Survey of Occupational Injuries and Illnesses (SOII). The SOII is a statistical estimate of nonfatal injuries based on a survey of more than 200,000 employers each year. The Electrical Safety Foundation International (ESFI) uses CFOI and SOII to distill information specifically pertaining to fatal and nonfatal occupational electrical injuries. The most recent data covers the 20 year period from 1992-2010, but mainly focuses on 2003-2010 data.