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

   shipping |
     weight |
   variance |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,157       71.57       71.57
         00 |      1,969       19.69       91.26
         01 |        374        3.74       95.00
         02 |        201        2.01       97.01
         03 |        110        1.10       98.11
         04 |         55        0.55       98.66
         05 |         35        0.35       99.01
         06 |         23        0.23       99.24
         07 |         35        0.35       99.59
         08 |         15        0.15       99.74
         09 |          4        0.04       99.78
         10 |          2        0.02       99.80
         11 |          1        0.01       99.81
         12 |          7        0.07       99.88
         13 |          4        0.04       99.92
         16 |          3        0.03       99.95
         17 |          2        0.02       99.97
         18 |          1        0.01       99.98
         37 |          1        0.01       99.99
         69 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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