one-true-awk/testdir/p.50

*9a7741deSElliott HughesBEGIN	{ FS = "\t" }
*9a7741deSElliott Hughes	{ pop[$4 ":" $1] += $3 }
*9a7741deSElliott HughesEND	{ for (cc in pop)
*9a7741deSElliott Hughes		print cc ":" pop[cc] | "sort -t: -k 1,1 -k 3nr" }