Fully automated driverless cars could make up nearly 10 per cent of global vehicle sales, or about 12 million cars a year, by 2035, the Boston Consulting Group said on Thursday. BCG said 44 per cent of US drivers it surveyed would consider buying a fully autonomous vehicle within the next 10 years, and that 20 per cent would be willing to pay an extra $5,000 or more for the advanced technology required to operate such a vehicle.