So a box plot displays five points.
The end of the left "whisker" is the minimum, in this case, I would assume either 1 or 0.
The end of the right "whisker" is the maximum, in this case, around 90.
The left edge of the block is the 1st Quartile (if you don't know how to get it or what it is message me and I'll tell you, but for now, it's basically the number in the middle between the median and the minimum)
The right edge of the block is the 3rd Quartile (again, same as before, except median and maximum now)
And the middle line in between those is the median, or 2nd Quartile.