And they all sell less cars than on the 70's too. But their profits still stay relatively high and revenue is steadily rising.

That doesn't tell me we got efficiency gains, they just shifted models on how and what to make. And where they make it. If we had true efficiency gains there'd be more cars sold, perhaps at cheaper prices.

Are your numbers (which I haven't seen) include the headcount of the makers of their outsourced parts?