Back on the main point: This reminds me of "global warming", with gathering data on some level of heat/ozone in a small period of time and freaking out when it hits its periodic absolute maximums and minimums. Is it not obvious that all things regarding our enviroment fluctuate? Is there any scientist stupid enough to think that the temperature or the ozone Isn't going to have periods of growth?
We've only been observing the ozone for what? 2 decades? 3 decades? I'm
sure it has been much bigger than this in the past. Scientists simply need funding and the more scare they manage to stir up the more eager people are to give it to them.
Yunno how we have global warming now? Well about 30 years ago they were heralding a new ice age from "global cooling"

. I kid you not.