Reuters reports U.S. carbonated soft drink consumption fell again in 2011, as still-growing sales of energy drinks failed to offset weakness in traditional sodas from Coca-Cola Co. and PepsiCo Inc.

Total sales volume of soda fell about 1% in 2011 to 9.27 billion cases, about the same level it was in 1996. Sales volume fell 0.5% in 2010. Excluding energy drinks, such as Red Bull and Rockstar, soda volume was down 1.5% last year.