I collected 1600 images in total. 841 of those images had Jupiter in them. Looking at individual image statistics, I calculate that about 1141 images had at least one target. So that's an efficiency of 71.25%. Not bad at all. I look forward to the day when I don't have to measure "observing efficiency".
Here's a sample of the data:
|Figure 1: The Jupiter system as seem from Earth at 17 Mar 2014 03:30:24 UTC|