I agree. Some of this is about the number of people taking it. But the average grade rising is supposedly a sign of increasing results. One more point. My friend at UCLA who studies IQ has said that normal is always a median of 100. However the curve is moving left meaning the average is going down.
https://drive.google.com/file/d/1AG0iHPkHgkbPapSKt0fmXQUHn_ZWCDbS/view?usp=sharing