Frequencies for first 10,000 rows of segmentid variable in planreport2016 dataset :

 Segment ID |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |          1        0.01        0.01
          0 |      9,639       96.39       96.40
          1 |        192        1.92       98.32
          2 |        142        1.42       99.74
          3 |          6        0.06       99.80
          4 |          4        0.04       99.84
          5 |          8        0.08       99.92
          6 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org ,