Note the blaming the victims:
In an interview, Sinaloa state prosecutor Marco Antonio Higuera sought to
downplay the problem, saying people flee for many reasons. He also seemed
to suggest that the displaced shared at least part of the blame for their
plight because they coexisted and cooperated with traffickers for so many
decades. Mexico drug war displaces families in Sinaloa Highlands

I believe that the level of displacement may be even greater in a shorter
time period than what happened in the Valle de Juarez in 2009-2010, but
there are similarities.
http://www.texasobserver.org/cover-story/the-deadliest-place-in-mexico

The Norwegian Refugee Council report on displaced person can be found at
this link:
http://www.nrc.no/?did=9633486
The section on the Americas starts at about page 55 of the full pdf of the
report.  molly

Insight Crime report on the displaced in the Sierra Madre