Olive oil production
(Annual average 2016 to 2021)
3,104,000 tonnes
Specific gravity at 20 °C = 0.911
( meaning 0.911 tonnes / 1000 litres )
… = 3,407,244,786 litres

5000 litres is 1/681,449 of annual prod.
(still a big amount for the average folks)

Olive oil regulation and adulteration

While less than 10% of world olive oil production meets the criteria for labeling as extra-virgin, it has been estimated that up to 50% of retail oil is labeled “extra-virgin”. Some oil labeled “extra-virgin” is diluted with cheaper olive oils or other vegetable oils.

So, ~40% of production retail is adulterated
… = 1,362,897,914 litres (or ++)

My first thought when I read the headline was “so that’s the opposite of ‘virgin.’”