Industrial Production numbers for the US
Industrial Production numbers for the US are based on the monthly raw volume of goods produced by industrial firms as factories, mines, and electric utilities. The Industrial Production data is used in conjunction with industry capacity estimates to calculate capacity utilization ratios for each line of the business, with a base year used as a benchmark level of 100%.
Industrial production is a measure of output of the industrial sector of the economy. The industrial sector includes manufacturing, mining, and utilities. Although these sectors contribute only a small portion of gross domestic product (GDP), they are highly sensitive to interest rates and consumer demand.
The release shows percentage changes month t0 month and year over year shedding light on the short term rates of change and business cycle growth, respectively.
The Industrial Production numbers for the US are made on the 16th of them each month.
You can find the releases and historical data on the given links:
http://www.federalreserve.gov/releases/g17/
http://www.federalreserve.gov/releases/g17/currrent/default.htm
http://research.stlouisfed.org/fred2/
Industrial Production numbers for the United States are coincident indicators telling us what is happening in the economy right now. They usually lag the ISM and NMI by around six months.