Frequencies for first 10,000 rows of segmentid variable in planreporta_to_m2013 dataset :

 Segment ID |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |          1        0.01        0.01
          0 |      9,909       99.09       99.10
          1 |          4        0.04       99.14
          2 |          3        0.03       99.17
          3 |         44        0.44       99.61
          4 |         16        0.16       99.77
          5 |         13        0.13       99.90
          6 |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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