I just called NMS - there were approximately 1.6 million VALID juniors who took the PSAT and were part of the calculation for the 209 commended score. She said in total, approx. 4 million freshman, sophomores, and juniors took the test.
They are still busy working on wrapping up the 2016 program and won’t even start looking at SI calculations until summer.
@OHToCollege The top 3% of 1.6 million = 50,000 contestants that moved forward with a an SI of 209 or higher. The I think this means the SI of 209 is the 97th percentile, but statistics are not my forte.