China's population skew heavily to middle age, whereas the US population pyramid is more like a population rectangle. It's entirely possible that they have an e

China's population skew heavily to middle age, whereas the US population pyramid is more like a population rectangle. It's entirely possible that they have an epidemic of dementia, but for a combination of social and demographic reasons that doesn't show in the data. Getting honest health data out of China, for example, is going to be pretty difficult. https://en.m.wikipedia.org/wiki/File:China_population_sex_by_age_on_Nov,_1st,_2020.png https://en.m.wikipedia.org/wiki/File:China_population_sex_by... https://www.populationpyramid.net/united-states-of-america/2024/ https://www.populationpyramid.net/united-states-of-america/2...