Nikon today announced that they've now produced a total of 120 million lenses over the course of both the the F-mount and Z-mount.
What that looks like what graphed out properly:
The blue diamonds represent Nikon announcements of lens production volume (left axis), which were made at various points in time (bottom axis). As you can see, the numbers rose quickly just after peak DSLR production was achieved (leftmost point), but have slowed considerably since.
By way of comparison, Canon hit the 120 million lens mark in August 2016.
