This doesn't give me a clear idea as a layman on how to interpret this information. Is it ok for the layman to believe that may 1st 1985 the variations of -5 to 5 were around 86 mean but in 2025 the same were around 82 mean, if that were to be the case, irrespective of the variations, it would not give me an idea of whether its concerning or not (this is just a random example, don't read too much into my beliefs)