That's hard to say. You're talking about net worth? If that's the case anyone with a mortgage would have a negative net worth? Whatever money they have lying around in their bank account is technically owed. Isn't it extremely difficult to find out whatever amount you have in your bank account is possibly borrowed money? If we're living in debt, I can have a billion dollars in my account - Borrowed.
There is so much conflicting data and information regarding money coming from every direction/agency/for profit business its just ridiculous. Lies, damn lies, and stats.
Over the weekend I heard Ben Carson, Secretary of Housing and Urban Development. He was talking his new initiatives. OK. One stat he threw out is that people who rent have an average net worth of 5k. People who own homes have net worth of 200k. Even a brain surgeon has a difficult time 'splaining the numbers. No where was debt mentioned in the discussion. In his defense, his interests seem genuine in their attempt to increase the standard of living of the lowest tier.
None of that is to be lost on the BS of trade accounting. Buy gold in the US, ship it to london and sell the same gold in London and US hums along! Trade measures the currency in aggregate, not the actual items being bought or sold.