"...In 2008, the total area under opium poppy cultivation in Myanmar is estimated at 28,500 hectares, representing an increase of 3 per cent from 27, 700 hectares in 2007. Opium poppy cultivation is concentrated, primarily, in Shan State, where 89 per cent of the total opium poppy was grown. The weighted national average opium yield for 2008 is estimated at 14.4 kilograms per hectare, leading to an estimated potential opium production of 410 metric tones. Compared to the estimated yield of 16.6 per cent and the estimated potential opium production of 460 metric tones in 2007, the estimates this year indicate a drop both in the yield and production of opium by 13 and 11 per cent, respectively..."