Frequencies for first 10,000 rows of segmentid variable in planreport2013 dataset :

 Segment ID |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |          6        0.06        0.06
          0 |      9,354       93.54       93.60
          1 |         84        0.84       94.44
          2 |         54        0.54       94.98
          3 |        280        2.80       97.78
          4 |         96        0.96       98.74
          5 |         78        0.78       99.52
          6 |         48        0.48      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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