Countries with the Largest Sovereign Wealth Funds

and they have oil

You're clearly not in finance, Findlay. That Norwegian "Petroleum Fund Global" is the talk of town. It's an extremely activist - as well as large - investor.

Now it's called The Government Pension Fund Global to indicate that it is primarily intended for future generations, and thus reduce the temptation among politicians to spend more money than the economy can absorb.

Too high spending, and inflation will go through the roof, while the competitiveness of Norwegian trade and industry goes through the floor.

According to a wildly supported Parlaiment (Storting) decree, any government is allowed to include only a part of the yearly return of the fund in its budget. Of course, given the figures involved, that is still a sizeable amount, if international financial markets have not been released.

For further referance, see https://www.nbim.no/en/publications/reports/2017/annual-report-2017/

Except for China and Singapore, seems like significant oil and gas production, at least significantly nationally-owned; smallish (citizen) populations requiring social and physical infrastructure; and somewhere between low and incomplete levels of corruption (because if corruption was overwhelming, money wouldn't find its way into such funds)?

Done, with plenty of time to spare. BUT - with the exception of two which seemed obvious to me, the rest were complete guesses.

And we still give foreign aid money to China...

Any chance of either shaving off two minutes from the time, or alternatively adding in another few SWFs?