I do not have facts, but the numbers of people in China would give them an edge. I do know china have restrictions on the second child, and twins allow for no fines for the second. so implanting tow eggs for some could save money and allow for two children.
If you are asking numbers per 1000 or a fixed number, I have no idea.
India
for identical its 6% for sepret its 10%
Yoruba
The country with the highest female circumcision rate is Egypt.
50%
It has the highest rate of twins births in the world.
As of the year 2011, the country that had the highest urbanization rate was Singapore. Singapore had an urban population of 100 and an urbanization rate of 1.2.
Nigeria is the country which has the highest population in Africa.
I believe Georgia has the highest literacy rate and Cuba has the second highest. :D
Iceland has a crime rate of 14, 726.95 reported criminals every 100,000 citizens which is the highest reported to this day
the country with the highest total fertility rate is Nigeria, Africa.
japan