I am interested in learning more about the Nanny Placement industry in
the US.  I have referenced the question below, in addition to the
websites listed below, but still need clarification on the following
questions.

http://answers.google.com/answers/threadview?id=185485
www.nanny.org
www.nannyassociation.com
www.americannannyschools.com

Nanny Placement
How many Nanny Placement agencies are there in the United States?
Who are the national players in the Nanny Placement industry in the United States?
At what rate is the nanny placement industry growing per year?
At nanny placement agencies, what is the typical recruiting process?
At nanny placement agencies, what is the typical screening process?
What is the estimated size of the Nanny Placement industry, in terms of revenue?
How many placements, on average, do agencies make per year?
Who are the high-end placement agencies?
What percent of nannies go through an agency?