....I found reports on the total worldwide count of cochlear implants.
The trend for cochlear implants worldwide is not only exponentially increasing - but accelerating. The doubling time has increased from every five years to every two years now.
Depending upon when this curve turns sigmoidal and the degree of commoditization of components creating affordability in the developing world, nearly every person worldwide who is deaf (6.6M) could potentially have an implant within the next 12 years.
A plot of cochlear device fidelity might also give a hint as to what year implants could exceed the volume range or fidelity of the human ear.
Perhaps the Six Million Dollar Man is closer than most thought.