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.
Međutim, od devedesetih godina, potrebe su se učetverostručile, dostižući 6800 GWh. Istodobno, proizvodnja struje smanjila se za polovicu, na oko 4000 GWh. Za to se okrivljuju oskudne kiše i zastarjelost hidroelektrana.