20548191 reads; of these:
  20548191 (100.00%) were paired; of these:
    4767031 (23.20%) aligned concordantly 0 times
    15198545 (73.97%) aligned concordantly exactly 1 time
    582615 (2.84%) aligned concordantly >1 times
    ----
    4767031 pairs aligned concordantly 0 times; of these:
      105149 (2.21%) aligned discordantly 1 time
    ----
    4661882 pairs aligned 0 times concordantly or discordantly; of these:
      9323764 mates make up the pairs; of these:
        6968743 (74.74%) aligned 0 times
        2212102 (23.73%) aligned exactly 1 time
        142919 (1.53%) aligned >1 times
83.04% overall alignment rate