Terrone

How much terrone-ness is there in an Italian?  It usually depends on where they come from.

Here's a guideline from a reliable source from Varese:

Basically, it is based on the following very simple and obvious schema:
0% Lombardia, Valle d'Aosta, Piemonte, Veneto, TrentinoAltoAdige, FriuliVeneziaGiulia
10% Liguria
20% EmiliaRomagna
30% Toscana
40% Umbria
50% Sardegna
60% Lazio, Marche
70% Molise, Abruzzo
80% Campania
90% Calabria, Basilicata, Puglia
100% Sicilia