Can anyone explain why there seem to be 2 conflicting sets of current
consumption figures for the PIC 16C7x series?

The data sheet for eg 16C73A contains a DC characteristics table with
the figures:

2,7mA typ, 5.0 mA max, XT mode, 4 MHz, 5.5 volts

but a few pages later are consumption graphs which appear to show
current of 1.4 mA typ/1.5 mA max for the same conditions?

I suppose it's only a 2:1 difference, but in my application that means
somebody might need to shin up a tree twice as often!

The graphical figures also purport to be for the whole family of devices
which seems a bit odd?

I expect I'm missing something obvious.

TIA
--
Alan Hall, Ipswich, UK