That's a very interesting number. Here a comparison, from Germany too: I used to live with 3 flatmates for several years in a 4BR apartment (165m²), our yearly

That's a very interesting number. Here a comparison, from Germany too: I used to live with 3 flatmates for several years in a 4BR apartment (165m²), our yearly usage averaged 5500-7000 kWh. That included heating water (electric boiler), but no room heating or air conditioning. I've recently moved out into a 1BR, 63m² apartment, and am targeting 1500-2000kWh - don't have any usage numbers yet since it hasn't been long enough, but those seem realistic to me.