Whereas non-fossil fuel capacity additions totalled 31 million kW in 2012, these renewable and nuclear power stations have totalled 36 million kW so far this year - and could be projected to be 43 or 44 million kW for the whole year.
Bottom line: an average of 190 GW of non-fossilfuel electricity generators would need to be built each year, worldwide, throught to 2060, under an assumed 10,000 GW world generating capacity.