According to the UN Office of Drugs and Crime (UNODC), the global production of opium declined from 8,890 tonnes in 2007 to 7,750 tonnes last year. Most opium, which is derived from poppies, is converted into heroin. Two-thirds of the rest is consumed in just five countries: Iran, Afghanistan, Pakistan, India and Russia. Nearly nine-tenths of the world's poppy cultivation, however, takes place in Afghanistan, though significant amounts also come from Mexico, Myanmar and Colombia. Afghan production has declined for each of the past two years. The UNODC reckons that a blight will cause Afghan opium production to fall this year, even though the area under poppy cultivation will probably remain unchanged.