21263712 reads; of these:
  21263712 (100.00%) were paired; of these:
    3931591 (18.49%) aligned concordantly 0 times
    16603751 (78.08%) aligned concordantly exactly 1 time
    728370 (3.43%) aligned concordantly >1 times
    ----
    3931591 pairs aligned concordantly 0 times; of these:
      173408 (4.41%) aligned discordantly 1 time
    ----
    3758183 pairs aligned 0 times concordantly or discordantly; of these:
      7516366 mates make up the pairs; of these:
        5488155 (73.02%) aligned 0 times
        1825015 (24.28%) aligned exactly 1 time
        203196 (2.70%) aligned >1 times
87.10% overall alignment rate