It shows the number of hits. If there are 100 hits, there are not necessarily 100 entries. You could look at the sweep without entering.
I think it just shows the total number of hits, so yes, 1 person could have entered 100 times, or 10 people could have entered 10 times. Or 100 people could have looked, but only 90 actually entered.
I look at it like a general guide. Lots of hits means lots of entries, but we don't know how many are repeat entries by the same person.