you might be confusing some units, that is also total energy used by nation divided by population, not a household energy usage. If you are using 12kW constantly, you would be using 8640kwh/month, which is way more than 400x of that 20kwh/month figure.
Even at the $0.15/kwh bill, that would put an average monthly American power bill at ~$1200 which would be absurd.
No, watt, not kilowatt. And US is an outlier by far, with 12 kw/month. https://en.wikipedia.org/wiki/2000-watt_society
you might be confusing some units, that is also total energy used by nation divided by population, not a household energy usage. If you are using 12kW constantly, you would be using 8640kwh/month, which is way more than 400x of that 20kwh/month figure.
Even at the $0.15/kwh bill, that would put an average monthly American power bill at ~$1200 which would be absurd.