20895303 reads; of these:
  20895303 (100.00%) were paired; of these:
    3476681 (16.64%) aligned concordantly 0 times
    16665857 (79.76%) aligned concordantly exactly 1 time
    752765 (3.60%) aligned concordantly >1 times
    ----
    3476681 pairs aligned concordantly 0 times; of these:
      166517 (4.79%) aligned discordantly 1 time
    ----
    3310164 pairs aligned 0 times concordantly or discordantly; of these:
      6620328 mates make up the pairs; of these:
        4921429 (74.34%) aligned 0 times
        1520080 (22.96%) aligned exactly 1 time
        178819 (2.70%) aligned >1 times
88.22% overall alignment rate