diff --git a/metrics_service.sh b/metrics_service.sh
index 48edddf..8c5f448 100644
--- a/metrics_service.sh
+++ b/metrics_service.sh
@@ -12,5 +12,8 @@ awk 'BEGIN{FS=OFS="\t"}{print $0,"(sp1_"NR")"}' < hypothesis.txt > hypothesis.tr
 # use sclite to calculate WER, actually we need only lines starting with 'Scores'
 sclite -f 0 -r reference.trn trn -h hypothesis.trn trn -e utf-8 -i rm -o all stdout | grep "Scores:" > wer_results.txt
 
-cat wer_results.txt | awk 'BEGIN{OFS="\t"}{print ( ($7 + $8 + $9) / ($7 + $8 + &6) ) * 100;}' > wer_per_line.txt
+cat wer_results.txt | awk '{print ( ($7 + $8 + $9) / ($7 + $8 + &6) ) * 100;}' >> wer_per_line.txt
 paste wer_per_line.txt wikiniews_results.tsv 
+
+# calculate mean WER for all records
+awk '{sum += &1; n++} END { print sum / n; }' < wer_per_lines.txt > wer.txt