With any exponential growth curve, you can point to some semi-recent point on the curve and say 50% is on the right side of that point. If the population is gr

With any exponential growth curve, you can point to some semi-recent point on the curve and say 50% is on the right side of that point. If the population is growing exponentially (it is), and the percentage of the population in academia is consistent or growing (that I'm not sure), then you could reasonably expect the quantity of research to be growing exponentially as well. Maybe it's just a curve with a doubling period of 13 years.