Can anyone point me to data regarding the proportions of the US GA
IFR-capable fleet that have:

A Both an ADF and an approach-approved GPS
B An ADF but no approach-approved GPS
C An approach-approved GPS but no ADF
D Neither
?

Either piece of equipment counts only if it is serviceable.

Alternatively, would anyone like to take a guess at the %ages? This is
Usenet after all, and we shouldn't let facts cloud the issue. ;-)

Thanks

Julian