 As time progressed, Calderón continued to escalate his anti-drug campaign, in which there are now well over 25,000 troops involved.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.