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Will any OECD country achieve a 10% or greater reduction in the national rate of obesity before 2030?

According to the OECD's 2017 Obesity Update (PDF), more than one in two adults and nearly one in six children are overweight or obese in the OECD area. The obesity epidemic spread further in the five years leading up to 2017, although at a slower pace than before. Despite this, projections show a continuing increase of obesity in all OECD countries.

A nearly tenfold variation in obesity rates can be seen across OECD countries; as of 2016, in Japan the rate of obesity was just 4.2%, while in the US it was 40%. (See a graphic on this page for full OECD obesity rates).

This question asks: Will any OECD country achieve a 10% or greater proportional reduction in the national rate of obesity, as compared to levels reported by the OECD for 2016, before 1 January 2030?

Resolution should cite a data release (from either the OECD itself or any of its 36 member states) that demonstrates that the national obesity rate of any OECD member country has fallen by 10% or more from 2016 levels at any time before 2030.

This question refers to the percentage of the total adult population (aged 15 years and over) considered obese. Note that we're looking for a 10% proportional drop (e.g. if the initial percentage is 20%, we'd be looking for a fall to 18%; if it were 40%, we would be looking for a drop to 36%).

In the event of a positive resolution, the question should close retroactively one day prior to the release of information that causes the positive resolution.

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