Data was obtained from the World Bank. Missing data interpolated for the evolution maps (Hermite spline method).
The most striking is the regression of cars per capita in the USA, Japan, and parts of Europe in the 2007-2011 yearspan (2007 was chosen because data is available for most countries fir this year; 2011 is the last year provided by the World Bank).
Evolution over 10 years however (2001-2011), suggest a renewed progression of the motorization level after the 2008 financial crisis.
Other inforgraphics (bloomberg.com):