Has anybody read anything or completed any research with respects to the disposable income of middle to top bracket sections of Nigerian society. Specifically I would like to perform some research on their spending patterns. What these men and women (16-35) spend money on, where they spend it (percentages and absolute numbers etc, )

Does anyone have access to this sort of information, have any quotable reports, or know of any good placees to start this sort of investigation.

, i've tried the 1991 census but these sorts of statistics have not been included.

Many Thanks,
I.j.