   -----------------------------------------------------------------------------
  |  #center  |    Dens     Core  |         PC1(0.77)         |  # el  | -outl  |
  |-----------|-------------------|   center   median    IQR  |--------|--------|
   -----------------------------------------------------------------------------
  | 1 - 15406 | 1435.77     1635  |     4.69     4.49    3.41 |  11746 |  11600 |
  | 2 - 19213 | 2144.37     2456  |    -5.28    -5.16    0.79 |  10368 |   9665 |
   -----------------------------------------------------------------------------
