Saint Pierre et Miquelon : ?

[mileslunn]

I've just been looking at the presidential results in St Pierre et Miquelon: https://fr.m.wikipedia.org/wiki/%C3%89lections_pr%C3%A9sidentielles_sous_la_Cinqui%C3%A8me_R%C3%A9publique_%C3%A0_Saint-Pierre-et-Miquelon

I cannot work out what on earth is going on. From extremely right wing (75% Giscard) to voting left of Seine-Saint-Denis:

My guess is some odd local issues - does anyone know what these might be?

It's a fairly poor area with high unemployment so I can see why they go far left and far right in bigger numbers as often if economically struggling, more attracted to radical ideas while if doing well tend to prefer status quo so closer to middle.