Frequencies for first 10,000 rows of segmentid variable in snp2019 dataset :

 Segment ID |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,937       99.37       99.37
          1 |         24        0.24       99.61
          2 |         22        0.22       99.83
          3 |         16        0.16       99.99
          4 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Feb 2019