Frequencies for segmentid variable in snp2017 dataset :

 Segment ID |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,875       99.63       99.63
          1 |         12        0.13       99.76
          2 |          6        0.07       99.83
          3 |         15        0.17      100.00
------------+-----------------------------------
      Total |      8,908      100.00

by Jean Roth , jroth@nber.org , 6 Dec 2016