Billions of dollars spent by the U.S. government in Afghanistan over the past decade has failed to make the country safer or substantially improve its economic prospects, according to a new report. The special inspector general for Afghanistan reconstruction [SIGAR] says its investigations led to the imprisonment of two U.S. Army sergeants who were found guilty of accepting illegal bribes. SIGAR's report also points out that between October and December 2015, Afghanistan proved even more dangerous than it was a year ago" and that the Taliban now controls more territory, around 30 percent, than at any time since 2001. The U.S. has spent $113.1 billion funding Afghanistan's reconstruction since 2002, including $8.4 billion for counter-narcotics efforts. Despite that enormous sum ... Afghanistan has the equivalent of 400,000 football fields of opium under cultivation. SIGAR's quarterly report follows a series of damning discoveries about Department of Defense spending in Afghanistan. In December, SIGAR released a report that said the DOD spent $150 million on private homes ... for between five and 10 U.S. government employees. Afghanistan is also perceived as one of the most corrupt countries in the world: Transparency International ranks Afghanistan as 166th out of 168 countries.