What was the total amount of residential properties sold in the US in
2004 and 2005? What are projected totals for 2006, 2007, and 2008?

What was the total amount of residential properties listed for sale on
all the Multiple Listing Services (MLS) in the US for 2004 and 2005?
What are projected totals for 2006, 2007, and 2008?

Of the residential properties sold in the US, what percentage is sold
by a real estate professional (Realtor or agent)? What percentage do
owners sell? What percentage do all others sell?

What are the 10 largest housing markets in the US? Which housing
markets have the largest number of buyers under the age of 40?

Please provide the sources used to answer each question.