Left reads:
          Input     :  21874345
           Mapped   :  20474622 (93.6% of input)
            of these:   2072552 (10.1%) have multiple alignments (41994 have >20)
Right reads:
          Input     :  21874345
           Mapped   :  18844357 (86.1% of input)
            of these:   1893076 (10.0%) have multiple alignments (41991 have >20)
89.9% overall read mapping rate.

Aligned pairs:  18227309
     of these:   1831824 (10.0%) have multiple alignments
                   76145 ( 0.4%) are discordant alignments
83.0% concordant pair alignment rate.