The problem with that list is the fact it doesn't give the year range. Fiesta, Golf etc. have been in production for a very long time. I would imagine that the percentage of Lexus vehicles owned in the areas would be small in any case. A better percentage would be those stolen out of of the numbers owned / parked on that area. I've seen elsewhere on the forum where it has been said something like seven Lexus stolen in one area in one night (I believe it was Richmond)
Also you would have to consider, along with the age of the vehicle, how many were 'joyriders' where the vehicles are later recovered. The Lexus, Land Rover etc are being stolen for export