Electricity Supply and Disposition Quarterly
Summary of changes
Activity on this program started: 1976
Beginning in 2015, a large number of renewable energy companies engaged in solar, wind, hydro and other renewable technologies were added to the survey's overall target population. As a result, the number of establishments surveyed increased from 400 to 1200 establishments. Consequently, users should use caution when making historical comparisons with the data prior to 2015.
As of 2003, the survey frequency has changed from quarterly to annual.