The NUMATS tables have it broken down more.

For 7th graders,
English: 35 = 99.9
Math: 34=99.8 but 35 is reported as 100. (For 6th graders, a 35 is 99.9. The stats don't mean as much out at the tails.)
Reading: 35 is 99.8, 36 is 100.
Science: 34 is 99.9
Composite: 32 is 99.9

For comparison to Duke, in the NUMATS 7th grade pool (n=6,818), 99% starts at 32 for English, 30 for Math, 33 for Reading, 29 for Science, 29 for composite.