It depends on model, cylinder size, power set up and calibre.
For example, I get around 60 shots from a Steyr LP50 compact set at 5fpe and in .177, I've adjusted it down a touch to 4.5fpe, so the shot count will go up slightly - possible around 70 now, but I have not shot form the full 200 bar on it as my main air cylinder is only at 180bar just now. They also do a "standard" version with a slightly bigger cylinder, it will do another 10/15 shots - so you could now be looking at 80/90 shots.
As you can see, it will depend on all the above, as all these figures are different, but all correct.
James