I am looking for the number of steel frame multi level office buildings that
are already in existence in the US and the number of multi level steel
frame office buildings that are being built every year in the US (world wide
is ok too, but US is sufficient).

I think concrete reinforced with steel is used to supliment steel
frame in most cases. Would you regard this as a steel frame building?
Should steel frame mostly not for office be excluded?  Neil

Yes that is ok if it is concrete reinforced.  

My scenerio is that I have to find a market for an invention.  The
invention surpresses floor vibrations due to walking (this is only a
problem in cheaply built steel frame building for the most part). 
Most buildings of this nature are office buildings, and since the
device I speak of is about $35,000 each, it is not realistic for any
sort of residential use.

The search does not have to be limited to office buildings, but I did
not know of any other structure that would benefit from what I
described above.  If you feel you found another category that I am not
thinking of that would benefit from what I said above, then please
include it.

Thank you for your prompt response, I really appreciate your help on this one.
Randy