Frequencies for first 10,000 rows of segmentid variable in planreport2010 dataset :

 Segment ID |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |          6        0.06        0.06
          0 |      8,888       88.88       88.94
          1 |        217        2.17       91.11
          2 |         52        0.52       91.63
          3 |        456        4.56       96.19
          4 |        163        1.63       97.82
          5 |        130        1.30       99.12
          6 |         88        0.88      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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