The United States has the highest vehicle ownership per capita in the world, with 832 vehicles in operation per 1000 people in 2016. Also, China became the worlds largest new car market in 2009. In 2011, a total of 80 million cars and commercial vehicles were built, led by China which built a total of 18.4 million motor vehicles. Definitions and terminology
In 1968 the Vienna Convention on Road Traffic gave one of the first international definitions of a motor vehicle:

(o) “Power-driven vehicle” means any self-propelled road vehicle, other than a moped in the territories of Contracting Parties which do not treat mopeds as motorcycles, and other than a rail-borne vehicle;
(p) “Motor vehicle” means any power-driven vehicle which is normally used for carrying persons or goods by road or for drawing, on the road, vehicles used for the carriage of persons or goods. This term embraces trolley-buses, that is to say, vehicles connected to an electric conductor and not rail-borne. It does not cover vehicles, such as agricultural tractors, which are only incidentally used for carrying persons or goods by road or for drawing, on the road, vehicles used for the carriage of persons or goods
Other sources might provide other definitions, for instance in the year 1977, ISO 3833:1977 provide other definitions. Ownership trends
The US publisher Wards estimates that as of 2010, there were 1.015 billion motor vehicles in use in the world.
Maceration  may refer to:

Maceration (food), in food preparation
Maceration (wine), a step in wine-making
Carbonic maceration, a wine-making technique
Maceration (sewage), in sewage treatment
Maceration (bone), a method of preparing bones
Acid maceration, the use of an acid to extract micro-fossils from rock
Maceration, in chemistry, the preparation of an extract by solvent extraction
Maceration, in biology, the mechanical breakdown of ingested food into chyme
Skin maceration, in dermatology, the softening and whitening of skin that is kept constantly wet
Maceration, in poultry farming, a method of chick culling