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For vehicles manufactured in previous years:
The average age is then calculated as the sum of all vehicle ages divided by the total number of vehicles. Vehicles that have an unknown year of manufacture are excluded from calculations of average age.
Average annual growth rate
A measure of the percentage change in a variable between one time period and another at an annual rate. This measure allows for the compounding of an increase or decrease over time. Thus an annual percentage increase of 10.0% results in a figure increasing by 21.0% over two years. The formula for calculating annual percentage change is :
where T1 is the value of the data item at the first time point, T2 is the value at the second time point, and M is the number of months between the two time points. The change to snapshot date must be taken into consideration when comparing data before and after the 2011 Motor Vehicle Census (March 31 snapshot date before 2011; January 31 snapshot date for 2011 onwards).
Motor vehicles constructed for the carriage of passengers. This category includes all motor vehicles with 10 or more seats, including the driver's seat.
Self-propelled motor vehicles containing an area primarily used for accommodation. This includes motor homes and powered caravans.
Estimated Resident Population (ERP)
The official measure of the population of Australia is based on the concept of residence. It refers to all people, regardless of nationality or citizenship, who usually live in Australia, with the exception of foreign diplomatic personnel and their families. It includes usual residents who are overseas for less than 12 months. It excludes overseas visitors who are in Australia less than 12 months.
The type of fuel is as reported to the registering authority and includes leaded petrol, unleaded petrol, diesel, LPG/other gases, dual fuel and other (which includes electric).
Gross Combination Mass (GCM)
Tare weight (i.e. unladen weight) of the motor vehicle and attached trailers, plus its maximum carrying and towing capacity. GCM is the weight measurement used for vehicles such as articulated trucks used for towing trailers.
Gross Vehicle Mass (GVM)
Tare weight (i.e. unladen weight) of the motor vehicle, plus its maximum carrying capacity excluding trailers.
Heavy rigid trucks
Rigid trucks of GVM greater than 4.5 tonnes.
Light commercial vehicles
Vehicles primarily constructed for the carriage of goods, and which are less than or equal to 3.5 tonnes GVM. This includes utilities, panel vans, cab-chassis and forward-control load carrying vehicles (whether four-wheel drive or not).
Light rigid trucks
Rigid trucks of GVM greater than 3.5 tonnes and less than or equal to 4.5 tonnes.
The manufacturer of the motor vehicle (e.g. Ford, Holden, Mitsubishi, Toyota).
Two and three wheeled motor vehicles constructed primarily for the carriage of one or two persons. This category includes two and three wheeled mopeds, scooters, motor tricycles and motor cycles with sidecars.
Non-freight carrying vehicles
Specialist motor vehicles or motor vehicles fitted with special purpose equipment, and having little or no load carrying capacity (e.g. ambulances, cherry pickers, fire trucks and tow trucks).
Motor vehicles constructed primarily for the carriage of persons and containing up to nine seats (including the driver's seat). This category includes cars, station wagons, four-wheel drive passenger vehicles and forward-control passenger vehicles. Campervans are excluded.
Motor vehicles of GVM greater than 3.5 tonnes, constructed with a load carrying area. This includes trucks with a tow bar, draw bar or other non-articulated coupling on the rear of the vehicle.
Rigid trucks are divided into two categories:
The state or territory of the motor registry at which a vehicle is registered.
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