Frequencies for first 10,000 rows of segmentid variable in planreport2014 dataset :

 Segment ID |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |          4        0.04        0.04
          0 |      9,484       94.84       94.88
          1 |        104        1.04       95.92
          2 |         72        0.72       96.64
          3 |        192        1.92       98.56
          4 |         64        0.64       99.20
          5 |         52        0.52       99.72
          6 |         28        0.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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