Japanese wig manufacturer Aderans researched ratios of men with thinning hair in major cities in the world. The researcher counted thinning hair men and haired men who were walking on the streets with their eyes. The research was conducted in 2000s. Here is the ranking of the ratios of men with thinning hair by city. Frankly, it is the ratios of bald men by city in the world.
|5||USA||New York / Los Angeles / Chicago||39.04%|
|15||Hong Kong||Hong Kong||24.68%|
The original report was already removed from the internet. Just cited articles are remaining, like www.moridukuri-kaigi.com/kami/percent.html.