github.com/benhoyt/goawk@v1.8.1/testdata/p.50 (about)

     1  BEGIN	{ FS = "\t" }
     2  	{ pop[$4 ":" $1] += $3 }
     3  END	{ for (cc in pop)
     4  		print cc ":" pop[cc] | "sort -t: +0 -1 +2nr" }