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The real estate in which you live yourself usually doesn't account for wealth in most indexes (except when you're paying taxes, of course).|
According to this data, an average German citizen has got for about 1,4 Million RMB in wealth - I haven't found any data that includes real estate, as real esate is not traded so often and prices therefore do not really reflect any real value. Average wealth in the US is currently at about 1,25 Million RMB per capita (end of 2010), but is recovering.
But remember, that in western countries there are also substantial diffrences between countryside and city, rich and poor villages and even diffrent regions (average wealth in the US' northeast is much higher than in the US's midwest region - same accounts for southern Germany which is richer than eastern or northern Germany).
However, wealth won't tell you anything about living quality. A better measure of living quality would be income or disposable (after insurances, taxes, depreciation and fixed spendings) income. This tells you about what people really can spend. Money itself is usless: if you have the money to buy a car but you don't actually have a car, this money won't improve your live until you buy the car. That's why economists are maximizing consumption, not investment.
In this context, you might want to read about the Solow Growth Model: according to Solow, a (small) country's GDP would be maximized if it invests 100 percent of its income. But people would then, of course, live a terrible life. So the country should go for maximum consumption, which will lead to a GDP that is lower than the maximum GDP, but people's life will be best. That's what is happening in most western countries, too (at least before the keynesianists got some power again during the financial crisis).