Dive summary:

• Warning to Ford owners: Vehicle thieves seem to like the F-250 crew cab 4x4 – or perhaps what's in the back of them – better than anything else, and the pickup has taken first place in the unwanted categfory away from the reigning champ, the Cadillac Escalade.
• The ranking comes from the Highway Loss Data Institute, which calculates thefts on the basis of claims per insured vehicle-years, meaning one vehicle insured for 12 months counts as a vehicle year, while two insured for only six month count the same.
• Ford scored at the top, with seven thefts per 1,000 insured vehicle-years for 2010-2012 models, though the Institute does not parse out which claims were for the whole truck and which were for items taken from it.

From the article:

... "On the other hand, sales of the Escalade have fallen in recent years, so there may be less of a market for stolen Escalades or Escalade parts." ...