I would like figures on the number or percentage of US households or
individuals (preferably households) with net worth in the following
categories:

$5 million-$10 million
10 million-$15 million
$15 million-$20 million
$20 million-$25 million

So, the ideal answer to my question would look something like this
(these are of course made-up numbers):

$5 million-$10 million: 200,000 US households
(Said otherwise, there are 200,000 households in the US whose net
worth is between 5 and 10 million dollars.)

$10 million-$15 million: 150,000 households
$15 million-$20 million: 100,000 households
$20 million-$25 million: 50,000 households

I have already found, through Google Answers, an IRS document
displaying what I believe to be individual net worth in the US in 2001
(http://www.irs.gov/taxstats/indtaxstats/article/0,,id=96426,00.html).
 While not quite as broken up as I would like to see (they break
things up into $5-10 million, $10-20 million, and $20 million or
more), my main problem with this document is its date; I would like
something more recent.

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Request for Question Clarification by pafalafa-ga on 10 Aug 2006 05:08 PDT

ajchianese-ga,

Data on wealth in the US is notoriously difficult to come by.

The closest I can get you are 2003 stats on income.  

In 2003, there were 11,168 tax returns with incomes between $5-10
million (about .01% of total number of returns), and another 6,126
returns of $10 million or more.

There are detailed breakouts below the $10 million mark, but none above.

Beyond that, there simply doesn't seem to be any reliable information
in the public domain.  The next available set of data that I know of
is the super-wealthy, with lists like Fortune Magazine's list of
wealthiest people.

Does that help at all?

pafalafa-ga

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Clarification of Question by ajchianese-ga on 17 Aug 2006 11:05 PDT

palalafa-ga,

I'm sorry for the delay, I assumed I would be notified via automatic
email of any responses to my question.  Thank you for your reply, but
I was looking for net worth data, not income data.  So, I guess it
doesn't help me.  You're right, these data are indeed quite difficult
to come by.

Best,
AJ

In the USA, punishment is typically quite mild if you lie about your
income, so many people do lie, both high and low. These likely average
out, so income groups may be quite accurate. Net worth can be quite
different from annual income and many people do not report (or even
know) their net worth to anyone. Those that do report a net worth, the
info is often confidential and may also be lies.
Even if you hack into protected data, analysis is difficult, and
subject to a wide variety of errors.   Neil