Against this evidence, proponents of higher CAFE standards argue that it is the footprint model of CAFE for trucks that encourages production of larger trucks with concomitant increases in vehicle weight disparities. A 2005 IIHS plot shows that in collisions between SUVs weighing and cars, the car driver is more than 4 times more likely to be killed, and if the SUV weighs over the car driver is 9 times more likely to be killed, with 16 percent of deaths occurring in car-to-car crashes and 18 percent in car-to-truck crashes. Recent studies find about 75 percent of two-vehicle fatalities involve a truck, and about half these fatalities involve a side-impact crash. Risk to the driver of the other vehicle is almost 10 times higher when the vehicle is a one-ton pickup compared to an imported car.