<P> U.S. employment statistics are reported by government and private primary sources monthly, which are widely quoted in the news media . These sources use a variety of sampling techniques that yield different measures . </P> <Ul> <Li> The U.S. Bureau of Labor Statistics (BLS) provides a monthly "Employment Situation Summary ." For example, BLS reported for December 2012 that: "Nonfarm payroll employment rose by 155,000 in December, and the unemployment rate was unchanged at 7.8 percent...Employment increased in health care, food services and drinking places, construction, and manufacturing ." </Li> <Li> Automatic Data Processing (ADP) also provides a "National Employment Report ." For the December 2012 period, ADP reported a 215,000 non-farm payroll increase . </Li> </Ul> <Li> The U.S. Bureau of Labor Statistics (BLS) provides a monthly "Employment Situation Summary ." For example, BLS reported for December 2012 that: "Nonfarm payroll employment rose by 155,000 in December, and the unemployment rate was unchanged at 7.8 percent...Employment increased in health care, food services and drinking places, construction, and manufacturing ." </Li> <Li> Automatic Data Processing (ADP) also provides a "National Employment Report ." For the December 2012 period, ADP reported a 215,000 non-farm payroll increase . </Li>

When has the unemployment rate been the highest