We use about 15 to 20 litres (= 3.9 to 5.2 gallons) per annum...

We use about 15 to 20 litres (= 3.9 to 5.2 gallons) per annum per person in Greece for home cooking as an average.

We use it for cooking, frying (yes frying) and raw in salads etc. We use it almost everywhere! How about you guys?