Frequencies for first 10,000 rows of trkwtvar variable in person dataset :

   shipping |
     weight |
   variance |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,316       73.16       73.16
         00 |      1,819       18.19       91.35
         01 |        348        3.48       94.83
         02 |        202        2.02       96.85
         03 |        130        1.30       98.15
         04 |         74        0.74       98.89
         05 |         32        0.32       99.21
         06 |         12        0.12       99.33
         07 |         37        0.37       99.70
         08 |         13        0.13       99.83
         09 |          2        0.02       99.85
         10 |          2        0.02       99.87
         11 |          1        0.01       99.88
         12 |          4        0.04       99.92
         13 |          2        0.02       99.94
         16 |          4        0.04       99.98
         17 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016