I think the unit is off. Starting from 2410 GWh & a compound increase of 59% per year gives us: 61,915 GWh (2410 * 1.59^7) which is about 61.915 TWh. So perhaps

I think the unit is off. Starting from 2410 GWh & a compound increase of 59% per year gives us: 61,915 GWh (2410 * 1.59^7) which is about 61.915 TWh. So perhaps the author meant 61.915 TWh instead of GWh. No way is this in anyway close to 8 doublings though. That would take 12 years or by 2035. (1.59^12 = 261x)