Although we can not provide you with an exact quote, we do have rough figures for the different age ranges. (justburyme.com)
We already knew we were working in rough figures, but claiming these estimations as inaccurate could be a case of a few hundred consoles or a few million. (alphr.com)
But we can take as a good rough figure 100g CO2e / kWh. (insteading.com)