Through observation, contact, talking to people. Especially friends working in banks, loan department. I do not have details figures, if you are interested, you might want to find out yourself.
such personal observation is inaccurate at best. how does 1 go about observing other's income?:think: also, how does 1 know if the truth is said? going on foot asking about personal info like income is not a good way to get a feel on the ground.
there are limits to obeservation, contact & talking to people. wad is missed out, how large the pool of contact & how many will actually divulge actual figures when asked. how many would divulge their income to anybody who asks?:think:
i'll leave personal observation as it is, an observation.