In a note in Norte Digital, veteran security reporter Feliz A. Gonzalez writes that during the past few months the incidence of "car theft with violence" has spiked up to an average of 13.3 per day during the past two months. In 2009 the average was 9 per day; this shot up to 10 per day in 2010 up to September, and is now spiking up even more. In October there were 397 incidences of car theft with violence, out of a total of 1561 cases of car theft reported to authorities.
Tuesdays, Wednesdays, and Fridays are the days one is most likely to lose one's automobile to thieves. Most cars stolen are older models, 1991 to 1995. It should be noted that many middle class families drive cars more than eight years old, since importation of these is much easier, with lower tariffs. Only relatively wealthy people can afford to buy newer models. Although the story doesn't contain information about this, I would guess that carjackings (that is, "car theft with violence," typically in which one is asked at gunpoint to abandon one's vehicle without taking the keys) is far more frequently directed at newer vehicles. I do not drive my newer vehicle to Juarez.