Las Rozas de Puerto Real, Patones, Venturada and La Hiruela are in the 'top ten' of towns in Spain with the most registered vehicles per inhabitant. This is due to their beneficial tax treatment to pay the Mechanical Traction Vehicle Tax (ITVM) The IVTM, created in Spain 36 years ago to replace the vehicle circulation tax - also known as 'el numerito' -, generates annual income of nearly 4,000 million euros to local treasuries.