Mexico, China and Indonesia belong each one to two different regions, for more details about the states/provinces distribution see their respective pages:
http://www.hbw.com/geo/mexico-
http://www.hbw.com/geo/mexico-
http://www.hbw.com/geo/china-
http://www.hbw.com/geo/china-
http://www.hbw.com/geo/
http://www.hbw.com/geo/west-
You can find the complete country information in: