Number of arXiv Papers By Area in the Last Ten Months

I subscribe to arXiv RSS feeds through Thunderbird, which gives me some interesting stats about the number of papers posted to each area. Here are the numbers in a handy graph for the last ten months or so:

plotarxiv

Of course, I'm ignoring the problem of cross-posts, missing feed items possibly from not retrieving them for a while in some months, etc. No doubt more sophisticated data can be presented somehow.

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