Devinette : quelle est cette courbe ?

Chers lecteurs,

Sauriez-vous deviner ce que représente cette courbe d’évolution de 1860 à 2010 ? Celui ou celle qui aura trouvé gagnera… notre admiration à tous !

A défaut, la solution d’ici quelques jours, assortie de quelques commentaires.

Anton

Comments

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J'ai trouvé ! (pour la prochaine fois, il eût été judicieux de changer le nom du fichier)
Bravo pour vos différents billets souvent instructifs et/ou intéressants. AMHA les réalités objectives se suffisent à elles-même et ne nécessitent pas de vitriol (que je crois contreproductif... même si je dois confesser avoir ri quelques fois) Salutations ! ;o)

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