awk 'BEGIN { delta = (delta == "" ? 2 : delta) ; max=20 }
{
if ($1 > max) {
maxf++;
maxc+=$2;
} else {
bucketNr = int(($1+delta) / delta)
cnt[bucketNr]++
cntc[bucketNr]+=$2;
numBuckets = (numBuckets > bucketNr ? numBuckets : bucketNr)
}
total+=$2;
}
END {
for (bucketNr=1; bucketNr<=numBuckets; bucketNr++) {
end = beg + delta
printf "%2d-%2d %3d %.2f%\n", beg, end, cntc[bucketNr], (cntc[bucketNr]*100.0)/total;
beg = end
}
if (maxf) printf ">%2d %2d %.2f%\n", max, maxc, (maxc*100.0)/total;
print "-------------";
print "Total: " total;
}' file