Ethnicity and SATs

This chart shows the racial differences in average scores for the SAT Math test from 1996 to 2016.  The Asian-White mean test score gap has roughly doubled from 35 points in 1996 (558 vs. 523) to 69 points in 2016 (602 vs. 533), while the Asian-Black test score gap has increased over that period from 136 points in 1996 (558 vs. 422) to 177 points in 2016 (602 vs. 425).
The significance of this is uncertain and there are a myriad of explanations but it is interesting and worth thinking about though. Open discussion, of course, is not allowed.