From current WHO data
Yes - I realize BMI is an imperfect indicator, but it is easy to gather and is a good enough proxy for population obesity. If you are extremely muscular your BMI is artificially high, if you have very little muscle it is artificially low. It is very possible to be "overweight" and in good physical shape, although it is less likely than being in good shape if your BMI is in the "average" range.
BMI, although simple to measure, has somewhat different ranges for different populations. For example people of Asian descent have the onset of overweight at 23.0 rather than 25.0. We'll use the standard cutoffs commonly used in the US and Europe.
Those definitions are:
underweight: BMI less than 18.5
normal: BMI between 18.5 and 24.99
pre-obese: BMI between 25.0 and 29.99
obese: BMI over 30.0
These days so many are obese that the category is broken down as medical attention is usually warranted.
obese class I: BMI between 30.0 and 34.99
obese class II: BMI between 35.0 and 39.99
obese class III: BMI over 40.0
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Some countries like The Netherlands and Denmark partly justify the cost of active transportation - walking and bicycling - infrastructure through lowed healthcare costs that come from a more physically fit population that is also more in a "normal" weight range. A form of preventative healthcare. It would probably make sense in the US, but large enough programs that would make a difference are probably politically and socially impractical.
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