Im Sambath says there are a number of reasons for the decline - from the changing travel habits of the Phnom Penh's citizens to the rise of the tuktuk - a motorized rickshaw.
VOA: standard.2010.06.14
No body needs glow in the dark corn cob holders (if theyre not out there thats my idea) but im sure they are.
Im not the first to point out that the study design has some issues, and in any case proving there isnt a difference is hard (this only shows that they failed to find a difference between drugs and dieting).