ref: 2a3ee1c2e3e1ea6477ca8715bf1531dbf34367a1 dir: /testdir/p.50/
BEGIN { FS = "\t" } { pop[$4 ":" $1] += $3 } END { for (cc in pop) print cc ":" pop[cc] | "sort -t: -k 1,1 -k 3nr" }