"This share has been age-standardized assuming a constant age structure to compare prevalence between countries and through time."

Not sure why the rate is so much higher in the US and Canada. Better detection might be part of the explanation.

Another possibility could be what people consume and how much of it, if we start to accept that cancer may be a metabolic disease. [1]

[1] - https://www.youtube.com/watch?v=06e-PwhmSq8 [video]