Not apparent in the original chart, but in the follow-on bubble chart there seems to be a weirdly strong connection between fire inspectors and pumping station

Not apparent in the original chart, but in the follow-on bubble chart there seems to be a weirdly strong connection between fire inspectors and pumping station operators. https://flowingdata.com/2017/08/28/occupation-matchmaker/ https://flowingdata.com/2017/08/28/occupation-matchmaker/ They both seem like very small groups, though, so probably just an amusing bit of statistical noise.