Test for wannabe data scientists: do thieves prefer stealing American Cars in Indiana?

This article claims that car thieves prefer American cars in Indiana. Absent a very important piece of information, this is a spurious claim. Why?
On the Indiana list, the top spot — for the fifth straight year —belonged to full-size Chevrolet pickup trucks. The report does not specify what model of Chevy pickup thieves preferred, but it did note that the most-stolen year is 1999.
Every other vehicle on the Indiana list — which included four other pickups, the Chevy Impala, Ford Taurus, Chevy Malibu, Pontiac Grand Prix and Jeep Grand Cherokee — was a domestic make. Indiana’s list has had only American vehicles for the past decade.
