If the energy efficiency across the United States was equivalent to that of the top performing states, the nation could save 1.2 million GWh, equivalent to 30 percent of its annual electricity use, according to a new report from the Rocky Mountain Institute (RMI). The top five performing states, according to the report, are in order New York, Alaska, Connecticut, Delaware and California, all with an electric productivity greater than 6.2. The five worst performing states, with an electric productivity less than 2.3, are South Carolina, Alabama, Kentucky and Mississippi.