Maybe I misunderstand; is this as it says, the cummulative number of jobs posts since 2008? So there have been 400 job posts in total?

If so then we should look at the slope of the graph for 'growth', and it in fact appears to have flattened recently.

And further, as the size of the market increases, you'd naturally expect more postings, if only because of churn.

Are they definitely different jobs, new positions? It could be a handful of people are rotating around a handful of jobs that then need to advertise every few months.

I mean, it's extremely likely that there are more Haskell programmers employed now than in 2008, but IMHO this doesn't show it very clearly, and doesn't show that the market is now growing.

To me there seems to be some irony in that some nice pure stats about Haskell programmers seem so ungrounded.