Rick, I can't give you an exact number, as I don't know, I've never counted. What I will tell you is that less and less of our packages, DON'T include scenery. We've got some good libraries of objects to use these days so adding even basic scenery can be done very quickly.
At some point here in the near future, I will actually make an effort to come up with a list of which packages DO included scenery with them. Then We'll make that a sticky or something so that the list is readily available.
MAIW (Works) Field
MAIW Albacete AB (LEAB)
MAIW Beale AFB
MAIW Beaufort MCAS (KNBC)
MAIW Elizabeth City
MAIW Elmendorf AFB (PAED)
MAIW French AB Scenery
MAIW Geilenkirchen
MAIW Grand Forks AFB
MAIW Indonesian Scenery
MAIW Kaneohe Bay (PHNG)
MAIW Kauhava AB
MAIW Kingsley Field (KLMT)
MAIW Luke AFB (KLUF)
MAIW MCAS Yuma
MAIW McConnell AFB
MAIW Miramar NAS
MAIW Moroccan AB scenery
MAIW NAS Kingsville
MAIW NAS Lemoore (KNLC)
MAIW NAS Meridian
MAIW Nellis AFB (KLSV)
MAIW Portland ANG (KPDX)
MAIW RAF Coningsby
MAIW RAF Lakenheath
MAIW Raleigh-Durham (KRDU)
MAIW Seymour Johnson AFB (KGSB)
MAIW Shaheed Mwaffaq (OJ0D)
MAIW UK Apache Bases
MAIW_Brough
Plus, some packages has instructions to dowload available sceneries not included in the package (i.e. Finnish Hornets)