Exhibition leek stats

[Alan]

This year I am growing Yorkshire Green exhibition leeks. This is the first time I have grown them.
The measurements below are purely the circumference of the leeks taken at the centre of the barrel. There are 2 measurements for the 4th July. Every leek had bloody bust, so the readings are "before and after" I had to strip them down to a tight button.
Click image to view chart
14th April	28th April
17th May	2nd June
9th June	16th June

[margalicious]

Whoa! That's nice. Can you teach me how to do that? Or can you give me some tips how to do that.