A basic difference between West. Germany and South Africa is the growth of the population. Until 1970 we worked on the assumption that population would increase by 10% up to the year 1985. But since then we have been faced with a decrease, which is now estimated at a 3,3% loss between 1980 and 1990, from 60,6 million to 58,6 million. The number of motor vehicles in West Germany will grow, though the population is decreasing. In 1977 we had 23,5 million motor vehicles inclusive of 20,2 million private cars. The number of private cars will grow in West. Germany from 22,0 million in 1980 to 25,9 million in 1990. This is an increase of 17% in the same time as the population is decreasing by 3,3%