The N, mean, median (...) are easily done with basic AGGREGATE (www.spss-tutorials.com/aggregate/
). The percentiles are more complicated though. One way to do it is
-Run "split files" on week
-Run an OMS block for capturing the table from "frequencies" as a new dataset
-Run frequencies with "format = notable" and all desired statistics
-Clean up the resulting dataset
-Run casestovars on it
Honestly, you'll need to master SPSS at a reasonable level in order to pull this off. If it's too much of a challenge, let us know where you get stuck, OK?