I'd be interested to see a break down based on industry and location, salaried vs hourly.

I could understand if self-employed people were included, as temporary staffing shortages are often covered by business owners.

I also wonder what the hours for office workers are like. I'm sure that most public sector employees work fairly regular hours.

Perhaps some people are temporary or "zero-hour" contractors with more than one gig?

Here in Australia, I suspect mining and construction will be the biggest contributors.

Every office job I have worked has been 38 hours with no overtime save for a handful of exceptions in 8 years of tech work.

Mining on the other hand can have consecutive 12 hour shifts be the norm, and I am sure that it gets worse than that.

We have some fairly strict award rates/employment regulations that govern things like that, but mining seems to be perhaps one of a few exceptions.

My guess, based on nothing, is they've adopted a Japanese-style ethic of putting in long hours for show because of a combination of high living costs and little opportunity.