Interesting fact of the day, about 78% of the worlds GDP is produced in countries using the metric system. 22% of the worlds GDP is produced by the imperial system (the system the USA and UK and a few other countries use).
Actually a correction, in that measurement the UK was counted as metric.. which is only partly true.. So the number for imperial system is a bit higher in reality.
@freemo , the USA has a weird hybrid system, where officially everything has to be done metric, but then translated to imperial for public consumption.
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@freemo I guess it depends on what field you are in. But no, I mean the USA.