21549314 reads; of these:
  21549314 (100.00%) were paired; of these:
    3873144 (17.97%) aligned concordantly 0 times
    16917769 (78.51%) aligned concordantly exactly 1 time
    758401 (3.52%) aligned concordantly >1 times
    ----
    3873144 pairs aligned concordantly 0 times; of these:
      170338 (4.40%) aligned discordantly 1 time
    ----
    3702806 pairs aligned 0 times concordantly or discordantly; of these:
      7405612 mates make up the pairs; of these:
        5614974 (75.82%) aligned 0 times
        1594298 (21.53%) aligned exactly 1 time
        196340 (2.65%) aligned >1 times
86.97% overall alignment rate