1 = Phongsali 2 = Luang Namtha 3 = Bokeo 4 = Oudomxai 5 = Luang Prabang 6 = Huaphan 7 = Xayabouri 8 = Xieng Khouang 9 = Vientiane province 10 = Vientiane prefecture 11 = Saysomboune 12 = Borikhamsay 13 = Khammouane 14 = Savannakhet 15 = Saravan 16 = Sekong 17 = Champasak 18 = Attapeu M = Mekong river