Left reads:
          Input     :  20463935
           Mapped   :  12864701 (62.9% of input)
            of these:   1428990 (11.1%) have multiple alignments (21530 have >20)
Right reads:
          Input     :  20463935
           Mapped   :  12427327 (60.7% of input)
            of these:   1386051 (11.2%) have multiple alignments (21544 have >20)
61.8% overall read mapping rate.

Aligned pairs:  12143969
     of these:   1347968 (11.1%) have multiple alignments
                   43057 ( 0.4%) are discordant alignments
59.1% concordant pair alignment rate.