Trucks Buses Microbuses Total Tot. 18.725.368 Other Vehic. Their use for evaluating the fleet have been contested by several groups inside and outside the Government. The sales of imported vehicles are prone to larger inaccuracies but they were not significant from 1960 to 1990. In order to determine the existing fleet in each year, the available data regarding sales and imports were considered.
Data referring to other imports are more difficult to retrieve.
It should be noted that the initial data have practically no influence on the fleet data from 1970 on and no influence at all on those of 1990 according to the scrapping criteria adopted. The collection of data was comprehensive and was not restricted to diesel vehicles. This will be useful to the projections to be made where it is necessary to establish the possible fuel substitution. The import data are summarized in the following table. Data until 1990 refer to imports and data after this year refer to the sale of imported vehicles.