According to Finnish version (https://yle.fi/a/74-20203091) ATH was hit several times with largest average over 15 minutes of 15.6 GW starting at 5 pm on thursday. Dividing that by population from Wikipedia gives approximately 2.7 kW / person.

https://yle.fi/a/74-20203419 gives a breakdown of ATH production over same period (14.3 GW): 5.8 wind, 4.2 nuclear, 2.3 heat+electricity, 1.8 hydro, 0.3 other.