Mexican migration continues to be dominated by migration flows to the US ‐ either of Mexicans or of immigrants from other Central and South American countries that use Mexico as a transit state. Unauthorised immigration from Mexico to the US is estimated to be at about
315 000 persons per year, adding to the about 6 570 000 unauthorised Mexicans already in the US. With the increased physical border controls that are the result of legislation to increase border security passed by the US government in 2006, there are signs that the flows
may have somewhat diminished since then.