The Occupational Safety and Health Administration was established in 1971. Since then, OSHA and our state partners, coupled with the efforts of employers, safety and health professionals, unions and advocates, have had a dramatic effect on workplace safety. Fatality and injury rates have dropped markedly. Although accurate statistics were not kept at the time, it is estimated that in 1970 around 14,000 workers were killed on the job. That number fell to approximately 4,340 in 2009. At the same time, U.S. employment has almost doubled and now includes over 130 million workers at more than 7.2 million worksites. Since the passage of the OSH Act, the rate of reported serious workplace injuries and illnesses has declined from 11 per 100 workers in 1972 to 3.6 per 100 workers in 2009. OSHA safety and health standards, including those for trenching, machine guarding, asbestos, benzene, lead, and bloodborne pathogens have prevented countless work-related injuries, illnesses and deaths. OSHA has placed a timeline that highlights key milestones in occupational safety and health history since the creation of OSHA.