 During the Calderón administration, the Mexican government has spent approximately US$7 billion in an 18-month-old campaign against drug cartels.It is estimated that during 2006, there were about 2,000 drug-related violent deaths, about 2,300 deaths during 2007, and more than 6,200 people by the end of 2008.Many of the dead were gang members killed by rivals or by the government, some have been bystanders.