I'm wondering the same thing for India. Not the top but looks surprisingly surprisingly high. Perhaps I'm reading the data wrong.
India has about 1.5 billion people, and has only recently been getting most of them online. Less IPv4 legacy, and it has always been obvious that IPv4 was never going to be ‘enough’ to actually onboard everyone anyway.
When I lived in India, everything had IPv6 out of the box.
Reliance Jio deployed cheap native v6 and tool massive market share. They single-handedly moved the market.
It's been discussed on the apnic blog and at meetings heaps