I wouldn't have put Mexico in the top 10. Maybe I would have guessed around 30.
The US government's estimates say that Mexico's about 3 million people less, putting it in 11th place behind Japan.
Seems like time to break out one of my favourite viral images:
This is even more astonishing when you think that a lot of that circle is occupied by seas, mountains, deserts and dense jungle. Most of the world's population is actually crammed into a few small places. Another nice graphic below showing the distribution of population within East Asia, China is huge, but much of it is basically empty of people.