Frequencies for cargo_bt variable in vehnit dataset :

 CARGO BODY |
       TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,167       83.78       83.78
          1 |         98        7.04       90.81
          2 |          8        0.57       91.39
          3 |         35        2.51       93.90
          4 |         17        1.22       95.12
          5 |          1        0.07       95.19
          7 |          6        0.43       95.62
         21 |          6        0.43       96.05
         96 |         15        1.08       97.13
         97 |         10        0.72       97.85
         98 |         21        1.51       99.35
         99 |          9        0.65      100.00
------------+-----------------------------------
      Total |      1,393      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016