Actual production count is a "poorly defined" term.
What about loaners, demo cars?
What about prototypes, release candidates?
What about cars produced and then scrapped as some major flaw was found?
What about cars ruined on the way to customer?
What about already totaled cars?
What about loaners that were sold to end customers after some time as CPO?
Etc.
One can limit himself to cars sold and delivered to end customers. But actual production will be somewhat higher than that.
So, I'm still sticking to VIN as 'cars produced' and not dealing with those pesky details of how, where, who, who for, what for, ...