От началото на 90-те години обаче търсенето е нараснало четирикратно, достигайки 6 800 гвтч.
Since the early 1990s, however, demand has risen fourfold, reaching 6,800 GWh. At the same time, electricity output has shrunk by half, to around 4,000 GWh. Scant rainfall and the antiquated state of the HPPs are to blame.