Via the BBC: Mexico drug war deaths over five years now total 47,515
That number is since 2006 and the escalation of the drug war by President Felipe Calderon.
According to the piece, while the murder rate continues to increase on an annual basis, the growth rate has slowed:
The PGR said that the 11% rise was "a significant decrease" on previous years.
In 2009-2010, murders jumped 70%; 2008-2009 saw a 63% rise and there was a 110% jump in 2007-2008.
But with the 2011 figures running just until September, the overall number of murders could be some 16,000.
But,
However, experts say the decline in killings may be the result of one cartel exerting overall control rather than specific success by the military or police.









