It's because the difference was only a mere 3 weeks, whereas the rest of the incremental status along the graph showed a diff. of 3 months (Jan. to April) and then 6 months (April to Oct.)
Not very standard, but it gets the point across. 1779
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As human beings, our greatness lies not so much in being able to remake the world (that is the myth of the Atomic Age) as in being able to remake ourselves. —Mohandas K. Gandhi
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