Bolivia: Nissan Sentra popular
No car sales data available for Bolivia, so this is a very rough estimation based on my observations during my trip to Bolivia in December 2005. A lot has happened since, so if you have any info about car sales in Bolivia please make sure to get in touch!
The Nissan Sentra seemed to be quite high in the rankings back in 2005, followed by both Suzuki Grand Vitara and Vitara, the Mitsubishi Montero (aka Pajero), the VW Polo Sedan and Gol. The Nissan Patrol, Pathfinder, Toyota Prado and RAV4 also seem reasonably successful. Again this is complete speculation based on observations in streets of La Paz.
Note: I took the above picture in La Paz in December 2005.