Frequencies for first 10,000 rows of segmentid variable in planreport2015 dataset :

 Segment ID |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |          2        0.02        0.02
          0 |      9,690       96.90       96.92
          1 |         78        0.78       97.70
          2 |         62        0.62       98.32
          3 |         96        0.96       99.28
          4 |         32        0.32       99.60
          5 |         26        0.26       99.86
          6 |         14        0.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 14 Apr 2016