Income from motor tax in 2012 was €1.01 billion, excluding income from driving licences, Certificates of Vehicle Roadworthiness and other miscellaneous receipts. The average payment in 2012 varied depending on the category of vehicle. The average payment for private vehicles taxed on the basis of CO2 emissions was €263.09, while the average payment for vehicles taxed on the basis of engine capacity was €475.82. For goods vehicles the average payment was €446.68. These categories make up over 91% of the national vehicle fleet – the remainder of the fleet consists of categories such as agricultural and haulage tractors, that generally carry a single annual rate of tax.