Basically, after a quick perusal of my website and my PayPal account, I got my sheet back in order, completed the first of the above two graphs--and remembered that one of the reasons that I've stopped writing short stories (beyond that they are not my natural length and I find them four to eight times as time-consuming as a comparable length of a novel) is that they are remuneratively poor.
Case in point, I pitted my book incomes versus short story incomes against each other in the second graph as a percentage of total income. From 2010-2013 you can just barely make out the little shifting line of red.
A good reminder for me not to futz overmuch with short stories. It's one thing to write one if it jumps in and wants to be written in a couple of hours. It's quite another if I have to agonize over it for three months.