21270719 reads; of these:
  21270719 (100.00%) were paired; of these:
    4701847 (22.10%) aligned concordantly 0 times
    15921473 (74.85%) aligned concordantly exactly 1 time
    647399 (3.04%) aligned concordantly >1 times
    ----
    4701847 pairs aligned concordantly 0 times; of these:
      183591 (3.90%) aligned discordantly 1 time
    ----
    4518256 pairs aligned 0 times concordantly or discordantly; of these:
      9036512 mates make up the pairs; of these:
        7503598 (83.04%) aligned 0 times
        1349798 (14.94%) aligned exactly 1 time
        183116 (2.03%) aligned >1 times
82.36% overall alignment rate