Those numbers are not based on 'productivity' but understating the value added of imported components...which displaced our own productive capabilities...which were destroyed by that substitution. The BLS and Feds mistakenly called this process "productivity increase". From a capital-use standpoint it would appear so. From an actual labor-productivity standpoint...looking at all labor inputs required...it actually has been a drastic decrease in labor productivity. All subsidized by the wages that China deliberately keeps at the Global price floor.
Did you have a source for this? Or did you just make it up yourself?