Wikipedia: Global human population growthamounts to around 83 million annually. 83 million people a year. It's down a bit, thankfully... but...moar basses needed!!!
Interesting. Even if 1/10th of 1% (0.001) on average end up playing bass, that’s 83,000 new players annually. You’d need to offset it against the annual death rate of 6.5% per 1000 and do some extrapolation and say .065x.001 or .000065 x 1000 or 0.065 lost bass players per thousand and then map the population growth and death rates by bass buying countries to see if you get a net gain or loss.
Raw averages can be deceptive so it’s important not to read too much into them. Especially when a number gets pulled out of the air since I have absolutely no way of actually knowing if 1/10th of 1% of the population owns or will eventually acquire a bass. But it’s an interesting enough exercise to strongly suggest the demand is still very much out there.